When I have 2 columns set in a Sublime Text window, can I display the same file in both columns?
Yes, you can. When a file is open, click on File -> New View Into File
. You can then drag the new tab to the other pane and view the file twice.
There are several ways to create a new pane. As described in other answers, on Linux and Windows, you can use AltShift2 (Option ⌥Command ⌘2 on OS X), which corresponds to View → Layout → Columns: 2
in the menu. If you have the excellent Origami
plugin installed, you can use View → Origami → Pane → Create → Right
, or the CtrlK, Ctrl→ chord on Windows/Linux (replace Ctrl with ⌘ on OS X).