Today I discovered an xterm feature by mistake

I used it recently to change the font size to ‘Unreadable’ and it indeed was, unreadable. Wonder why that options exists.

To search very long texts by the "text shape". Same idea as some popular editors show on the right, next to the scrollbar:

I used to monitor multiple long running tests that way with “& banner done”

I guess developers just had some fun :D

The menus in Smalltalk systems are accessed in the same manner.

Yep! Works for the middle and right mouse buttons, too.

Yes, I used that feature. You can also display different menus by Ctrl with the other mouse buttons.

Yes.

Once I needed to use xterm for something for the first time, so I made a very daring and bold move...

I read the manual.