How to turn on "Preserve scroll position" in every line in Prototype

Hello,
I have to many lines in my Prototype (over 200?). How can I check “Preserve scroll position” in one click in every line in my prototype? Its annoying to click every one :frowning_face:

Thanks,
Ania

My gut says to select all the lines, put them in a group or frame, and then click “Preserve scroll position” on that group or frame.

But there is impossible to select all. You can select only one… :frowning: