What the heck is this?

[veresdaniel]

Hi,

Can anyone tell me what is this?
I try to use trailing spaces plugin, but can not set my hotkey (alt+command+t), this symbol popup always comes up.

It is very annoying. Thanks.

[svenax]

Well, that is the Special Characters… popup from OS X. But that is normally bound to ⌃⌘Space. Apparently Sublime Text binds it to ⌥⌘T instead. It does not appear in the default keymap, so I guess you just have to bind the trailing spaces command to some other key.