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@@ -138,6 +138,54 @@ The single line edge tool allows you to create straight line segments between tw
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- The line tool works in any sketch plane
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- Multiple line edges can be created in sequence by right-clicking after each line
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#### Multi-Line Edge Tool
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The multi-line edge tool allows you to create multiple connected line segments in a single operation, making it efficient for drawing continuous paths, polylines, or complex connected geometries.
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**Features:**
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-**Continuous edge creation**: Click multiple points to create a chain of connected line segments
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-**Real-time preview**: See each edge shape while moving the mouse before clicking
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-**Precise length control**: Use the distance input dialog (Tab key) for exact edge lengths
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-**Snap support**: Automatically snaps to existing nodes and geometry
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-**Distance annotations**: Real-time distance display for the current edge being drawn
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-**Flexible finalization**: Continue adding edges until you right-click to finalize the entire sequence
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**How to use:**
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1. Select the **Multi-line Edge** tool from the toolbar 
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2. Click to set the first point (start of the first edge)
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3. Move the mouse to see a preview of the first edge
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4. Click to set the second point (end of first edge, start of second edge), or press **Tab** to enter an exact length value
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5. Continue clicking to add more connected edges, each new click starts a new edge from the previous edge's end point
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6. Press **Right-click** to finalize the entire multi-line sequence and add all edges to your sketch
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**Keyboard shortcuts:**
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-**Tab**: Open distance input dialog for precise length control of the current edge
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-**Escape**: Cancel the entire multi-line creation operation
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-**Enter**: Finalize the current edge length (if using distance input) and continue to the next edge
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-**Right-click**: Finalize the entire multi-line sequence and complete the operation
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**Workflow details:**
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- Each click after the first creates a new edge connected to the previous edge's end point
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- After entering a distance with Tab, the tool automatically starts a new edge from the end of the previous one
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- The distance annotation shows the length of the edge currently being drawn
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- All edges in the sequence are added to the sketch together when you right-click to finalize
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**Tips:**
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- Use the snap feature to create multi-line edges that connect precisely to existing geometry
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- Multi-line edges are ideal for creating continuous paths, outlines, or complex connected shapes
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- The tool works in any sketch plane
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- Keep clicking to add more edges - there's no limit. For example, you can click 3 times to create 2 edges, or 10 times to create 9 edges. All edges remain temporary until you right-click, which adds all of them to your sketch at once
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- If you make a mistake, press Escape to cancel the entire sequence and start over
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- The last edge in the sequence will be removed if it hasn't been finalized (no end point set) when you right-click
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**Comparison with Single Line Edge Tool:**
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-**Single Line Edge**: Creates one edge at a time, finalizes automatically after two points
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-**Multi-Line Edge**: Creates multiple connected edges in sequence, requires right-click to finalize
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- Use single line edges when you need individual disconnected segments
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- Use multi-line edges when you need a continuous chain of connected segments
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#### Circle Creation Tools
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EzyCad provides a method for creating circles in sketch mode using the **center-radius approach**.
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-**Invalid Geometry**: Circles that would be too small are rejected
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-**Snap Integration**: Use existing snap points for precise circle placement
The arc segment tool allows you to create circular arc edges by defining three points that lie on the arc: a start point, a middle point, and an end point.
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**Features:**
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-**Three-point creation**: Click to set the start point, then the middle point, then the end point
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-**Real-time preview**: See the arc shape while moving the mouse after setting the first two points
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-**Automatic finalization**: The arc is automatically created and added to your sketch after the third point is clicked
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-**Circular arc**: Creates a smooth circular arc that passes through all three points
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-**Snap support**: Automatically snaps to existing nodes and geometry
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-**Unique points**: All three points must be different (cannot be coincident)
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**How to use:**
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1. Select the **Arc Segment** tool from the toolbar 
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2. Click to set the start point of the arc (first point)
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3. Click to set a point on the arc between start and end (middle point)
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4. Move the mouse to see a preview of the arc
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5. Click to set the end point of the arc (third point)
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6. The arc segment will be automatically created and added to your sketch
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**Point order:**
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-**First click**: Start point - where the arc begins
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-**Second click**: Middle point - a point that lies on the arc between start and end
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-**Third click**: End point - where the arc ends
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**Keyboard shortcuts:**
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-**Escape**: Cancel the current arc creation (clears all points)
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-**Note**: The arc is automatically finalized after the third point, so no manual finalization is needed
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**Tips:**
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- The three points define a unique circular arc that passes through all of them
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- Use the snap feature to create arcs that connect precisely to existing geometry
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- The arc tool works in any sketch plane
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- Arc segments can be used as part of closed shapes that form faces
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- The middle point helps define the arc's curvature and direction
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- All three points must be unique - clicking the same point twice will be ignored
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**Technical details:**
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- The arc is created using the three points to define a circle, then trimming it to the arc segment
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- Internally, the arc is represented as two connected edges for proper topology
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- Arc segments can be combined with straight edges to create complex closed shapes
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**Comparison with Circle Tool:**
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-**Circle Tool**: Creates a full circle from center and radius point (2 points)
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-**Arc Segment Tool**: Creates a partial arc from three points on the arc (3 points)
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- Use circles when you need a complete circular shape
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- Use arc segments when you need a curved edge that's part of a larger shape
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#### Rectangle and Square Creation Tools
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EzyCad provides three tools for creating rectangular shapes in sketch mode: square, rectangle from two points, and rectangle with center point.
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##### Square Tool
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The square tool allows you to create perfect squares by defining a center point and an edge midpoint.
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**Features:**
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-**Two-point creation**: Click to set the center point, then click to set the midpoint of one edge
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-**Real-time preview**: See the square shape while moving the mouse
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-**Perfect square**: Automatically ensures all sides are equal length
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-**Orientation control**: The square's orientation is determined by the direction from center to edge midpoint
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-**Precise size control**: Use the distance input dialog (Tab key) for exact side lengths
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-**Snap support**: Automatically snaps to existing nodes and geometry
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**How to use:**
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1. Select the **Square** tool from the toolbar 
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2. Click to set the center point of the square
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3. Move the mouse to see a preview of the square
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4. Click to set the midpoint of one edge (this defines both the size and orientation), or press **Tab** to enter an exact side length value
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5. The square will be created with four edges and added to your sketch
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**Keyboard shortcuts:**
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-**Tab**: Open distance input dialog for precise side length control
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-**Escape**: Cancel the current square creation
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-**Enter**: Finalize the square (if using distance input)
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**Tips:**
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- The distance from center to edge midpoint determines half the side length
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- Use the snap feature to create squares that are precisely positioned relative to existing geometry
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- The square tool works in any sketch plane
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- Squares automatically form closed faces that can be extruded
The rectangle tool allows you to create rectangles by defining two opposite corners.
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**Features:**
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-**Two-point creation**: Click to set the first corner, then click to set the opposite corner
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-**Real-time preview**: See the rectangle shape while moving the mouse
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-**Precise size control**: Use the distance input dialog (Tab key) for exact dimensions
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-**Snap support**: Automatically snaps to existing nodes and geometry
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-**Automatic corner calculation**: The system automatically calculates the other two corners
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**How to use:**
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1. Select the **Rectangle** tool from the toolbar 
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2. Click to set the first corner point
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3. Move the mouse to see a preview of the rectangle
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4. Click to set the opposite corner point, or press **Tab** to enter exact distance values
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5. The rectangle will be created with four edges and added to your sketch
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**Keyboard shortcuts:**
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-**Tab**: Open distance input dialog for precise dimension control
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-**Escape**: Cancel the current rectangle creation
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-**Enter**: Finalize the rectangle (if using distance input)
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**Tips:**
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- The two points define opposite corners of the rectangle (diagonal)
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- The rectangle edges are automatically aligned with the coordinate axes
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- Use the snap feature to create rectangles that are precisely positioned relative to existing geometry
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- The rectangle tool works in any sketch plane
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- Rectangles automatically form closed faces that can be extruded
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##### Rectangle Tool (Center Point)
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The rectangle with center point tool allows you to create rectangles by defining a center point and a corner point.
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**Features:**
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-**Two-point creation**: Click to set the center point, then click to set a corner point
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-**Real-time preview**: See the rectangle shape while moving the mouse
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-**Centered creation**: The rectangle is centered on the first point
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-**Precise size control**: Use the distance input dialog (Tab key) for exact dimensions
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-**Snap support**: Automatically snaps to existing nodes and geometry
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**How to use:**
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1. Select the **Rectangle with Center Point** tool from the toolbar 
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2. Click to set the center point of the rectangle
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3. Move the mouse to see a preview of the rectangle
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4. Click to set a corner point (defines both size and orientation), or press **Tab** to enter exact distance values
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5. The rectangle will be created with four edges and added to your sketch
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**Keyboard shortcuts:**
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-**Tab**: Open distance input dialog for precise dimension control
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-**Escape**: Cancel the current rectangle creation
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-**Enter**: Finalize the rectangle (if using distance input)
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**Tips:**
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- The rectangle is centered on the first point you click
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- The distance from center to corner determines the rectangle's dimensions
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- Use the snap feature to create rectangles that are precisely positioned relative to existing geometry
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- The rectangle tool works in any sketch plane
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- Rectangles automatically form closed faces that can be extruded
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**Comparison of Rectangle Tools:**
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-**Rectangle (Two Points)**: Define opposite corners - useful when you know the corner positions
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-**Rectangle (Center Point)**: Define center and corner - useful when you want the rectangle centered on a specific point
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-**Square**: Always creates a perfect square - use when you need equal sides
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#### Slot Creation Tool
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The slot tool allows you to create an oblong or oval-shaped slot with rounded ends. A slot consists of two semicircular arcs connected by two straight parallel edges.
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**Features:**
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-**Three-point creation**: Click to set the first arc center, then the second arc center, then a point to define the radius
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-**Real-time preview**: See the slot shape while moving the mouse after setting the first two points
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-**Automatic finalization**: The slot is automatically created and added to your sketch after the third point is clicked
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-**Rounded ends**: Creates semicircular arcs at both ends with equal radius
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-**Parallel edges**: The two straight edges connecting the arcs are always parallel
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-**Precise size control**: Use the distance input dialog (Tab key) for exact dimensions
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-**Snap support**: Automatically snaps to existing nodes and geometry
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**How to use:**
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1. Select the **Slot** tool from the toolbar 
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2. Click to set the center point of the first arc (start of slot)
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3. Move the mouse to see a preview of the first edge
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4. Click to set the center point of the second arc (end of slot)
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5. Move the mouse to see a preview of the slot shape
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6. Click to set a point that defines the radius of the arcs, or press **Tab** to enter exact distance values
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-**Important**: The radius is measured from the second arc center (the point you clicked in step 4) to this third point
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- This radius determines the cross section: the slot's cross-section dimension equals 2 × radius
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7. The slot will be automatically created with two arcs and two straight edges and added to your sketch
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**Point order:**
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-**First click**: First arc center - the center of the arc at one end of the slot
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-**Second click**: Second arc center - the center of the arc at the other end of the slot
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-**Third click**: Radius point - defines the radius of both arcs
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- The distance from the **second arc center** (second click) to this point determines the arc radius
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- The slot's cross section (perpendicular to the slot length) equals twice this radius
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- Both arcs use the same radius, creating a symmetric slot
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**Keyboard shortcuts:**
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-**Tab**: Open distance input dialog for precise dimension control
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-**Escape**: Cancel the current slot creation
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-**Enter**: Finalize the slot (if using distance input)
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-**Note**: The slot is automatically finalized after the third point, so no manual finalization is needed
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**Tips:**
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- The slot length is determined by the distance between the first and second arc centers
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- The radius of both arcs is determined by the distance from the second arc center to the radius point (third click)
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- The slot's cross section (the dimension perpendicular to the slot length) equals 2 × radius
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- This is because each arc is a semicircle with the specified radius, extending equally in both perpendicular directions
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- For example, if you click the radius point 3 units away from the second arc center, the slot cross section will be 6 units
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- Both arcs have the same radius, creating a symmetric slot shape
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- The slot orientation (which dimension is length vs width/height) is determined by the direction from the first to the second arc center
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- Use the snap feature to create slots that connect precisely to existing geometry
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- The slot tool works in any sketch plane
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- Slots automatically form closed faces that can be extruded
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- The slot orientation is determined by the direction from the first to the second arc center
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**Technical details:**
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- The slot consists of four edges: two semicircular arcs and two straight parallel edges
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- The arcs are created using the arc segment functionality
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- The straight edges connect the arcs at their endpoints
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- The slot forms a closed shape suitable for face creation and extrusion
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**Common use cases:**
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- Creating mounting slots for screws or bolts
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- Designing elongated holes for adjustment
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- Creating rounded-end cutouts in parts
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- Designing slots for sliding mechanisms
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#### Operation Axis Tool
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The operation axis tool allows you to define a reference line for mirroring and revolving operations in sketches.
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