I didn’t notice this Ctrl ‘+’ or Ctrl ‘-’ to adjust segment count.
As I always just typed the amount before drawing them.
When was this added?
If my memory serves me correctly, It is a new feature introduced in 2016…
It works with polygons too.
and Pie tool 
Not for rectangle tool for obvious reasons!
I still prefer the type in segment method though.
Thanks for letting me know @Box!.
good to know that I haven’t been missing this out for years!
Yes its new feature added in 2016 (for example click circle and hold ctrl and other end to num pad hit the plus (+) key and it will increase the segments with same hold ctrl and negative (-) key will decrease the segments )