Change note duration and move subsequent notes without deleting them

Hi! I am searching for a function, which changes the duration of notes, but does NOT delete subsequent notes. (Quite a lot of alberti-like figures in 64th shall be changed to simple 8th notes that will be down-sized.)
Does a function like that exist at all? Or which approach should I take?
Thank you! (Dorico Newbie coming from Finale)

You want to shuffle other notes forward or backward when you change the duration of a selected note? If so, then you need Insert mode:

Thank you, @dspreadbury !