Comparing the contents of two files in Sublime Text

Question

I have two cloned repositories of two very similar open-source projects, which I have been working on in different instances in Sublime Text 2 to arrive at my desired result. Co

Answer 1

View - Layout and View - Groups will do in latest Sublime 3

eg:

Shift+Alt+2 --> creates 2 columns

Ctrl+2 --> move selected file to column 2

This is for side by side comparison. For actual diff, there is the diff function other already mentioned. Unfortunately, I can't find a way to make columns scroll at the same time, which would be a nice feature.