How to reveal Tab in File Tree?



I’m using Cloud9 with Windows. How to reveal Tab in File Tree (Project Files) ?
The imagem below is of my actual Cloud9:

Thanks for the help …


use window workspace menu, or press ctrl-shift-l



Thanks for the help but it´s not working
When I’m a Mac I see the file tree (without doing nothing), but when I’m on a Windows it doesn´t appear.(even when a select the window workspace menu).
Please see image below.


Which version of internet explorer are you using?
Does the same issue happen on chrome too?


Hi, the version of the Internet Explorer is 11.
With Chrome, I don’t have this issue.


Just a heads-up, we don’t officially support IE: Supported Browsers . I’d recommend using Chrome or Firefox if they’re available to you.