This normally doesn't matter much, even in some of the longer adventure chapters that I've run (although I do always have DDB at 90% zoom already). There are occasions though when the lack of sidebar scrolling means you can only jump to content up to a point.
Example:
Until I zoom all the way out to 67%, I can't click on Wood Elf when every option for elves is unlocked. At 90% zoom, I can only get as far as Sea Elf before having to manually scroll the rest of the way down.
This normally doesn't matter much, even in some of the longer adventure chapters that I've run (although I do always have DDB at 90% zoom already). There are occasions though when the lack of sidebar scrolling means you can only jump to content up to a point.
Example:
There have been other requests for this too. Hopefully, it gets fixed.