How to view a long textdiff?

Question

I'm trying to do a textdif with Source Tree 2.3.1 using git. I'm comparing between my current version and a fairly old version and its a somewhat long file, so there are alot of changes in the particular file. In the compare view, when I scroll to the bottom it shows an ellipsis and appears to cut off a good chuck of the changes.

I noticed the pull-down menu with the gear icon has an option for "external diff". Maybe that's my answer, but when I click it, nothing happens. Do I need to install an external diff tool or something?

kjgregory · Accepted Answer

Better yet, while I was in the diff settings menu trying to get an external diff tool setup (and not having much success), I noticed that you can modify the diff limit both in lines of code and in bytes. I bumped it from 500 lines to 2000 and that takes care of my problem easily.