It multiplied by 1.25, which compounds: the same button was a 0.25x step at fit and a 1.75x step at 7x,
so the first press did almost nothing and the last threw the picture across the frame.
Added rather than multiplied, so every press is the same amount of change — which is what somebody
nudging a crop into place is asking for, and it makes the number beside the buttons predictable, which
a factor never is.
Rounded to a tenth, because floating point turns 1 + 0.1 + 0.1 into 1.2000000000000002 and the label
shows it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>