Naming / Renaming Blocks

This seems like it ought to be simple, but maybe I’m missing something. Is it possible to name / rename blocks from their default numbers to something more descriptive? I found info under “Quick Info” on https://adinserter.pro/documentation/quick-start that suggests it is possible, and nowhere does it indicate this is a “pro” only feature (I am using the free version currently), but I can’t seem to name or rename the blocks.

Can someone shed some light on this? Thank you!