jumping to documentation when I have a question about how/why something is working not like I expect it to.
COBOL is full of weirdnesses and multiple ways to do things.
Example, here's one of the DISPLAY statement's possible syntaxes:
Source:
https://www.microfocus.com/documentation/visual-cobol/vc50pu8/VS2019/HRLHLHPDF80D.html
I don't think I really ever read too much in the QB help until I made Santa's Christmas Rescue. Since then, it's my go-to for info first. It's actually really amazing documentation and has basically everything in it short of the assembly hacks people did later on. Visual Basic's built in help (at least the ones I've used) is on par as well.