Out of curiosity, from which design app did you model your decision? I’m not questioning you, but I’m very curious to know which design software GUIs use an idi

Out of curiosity, from which design app did you model your decision? I’m not questioning you, but I’m very curious to know which design software GUIs use an idiom so different from what I’ve experienced, yet is common enough to be a convention. I’ve used many design apps for many purposes and never used one that would switch you out of any mark making tool automatically once a single mark was made. (I’m a UI designer and developer primarily, so new (to me) things in design tool UIs tick a lot of personal interest boxes.)