when flows get crowded, it becomes awkward to zoom in/out by pinching. Often, one unintentionally rearranged flow components.
Adding a one-finger zoom, as many other apps provide, will allow a more agreeable zooming experience: Rather can touching the screen with two fingers, and moving them together or apart, one-and-a-half click with one finger (that is, touch, release,then touch again, like a double click without the final release), then drag the finger. Up/down for zoom out/in, or reverse - user preferences differ in this point. Zooming action concludes when finger is released again.
Motivation: it is easier to find one empty spot on screen than two.
add one-finger zoom to editor
Moderator: Martin