Black background 2 or 3 capital letter things. Topic is solved

[AndrewDA]

Does anybody please know what these black background 2 or 3 capital letter things are that appear sometimes in SciTE4Autohotkey. Are they something to do with undo but seem intermittent. Typical ones say CAN SO and SUB. I have put a screenshot at https://www.dropbox.com/sh/0q2i38v8xb1r ... Thppa?dl=0 . They are probably terrific, but I don't know what they are for and don't want them, and I can't find out about them anywhere on the internet.

Andrew