Hi. i think this feature would helps alot because i've tried to make make my own scrollbar but it hard to do confused see the below code:

//window -apCBd @test | drawtext @test 1 100 100 This Found! | drawtext -o @test 4 200 390 Find This!

in this case. the window's scrollbar will appear so i can scroll to the end of the drew text.

that's all and sorry for my english.