completion not working

[IlyaBokovenko]

Hello again. How can I get symbols completion window as shown on wiki? When I start typing \something completion window is not appearing

[mvoidex]

Hi. I'm not actively supporting it (to be honest I even have no Sublime on my laptop now), but as fas as I remember completion doesn't appear with 'Plain Text' syntax. Have you tried to change syntax to LaTeX for example?