[Feature Request] Method for mass edits (interface)

[alfredjr]

Is your feature request related to a problem? If so, please describe it.
I was changing the depth chart on my picture and it was difficult to make a lot of changes, since I had to click each pixel separately.

Describe the solution you'd like
I would love to see a press and hold feature for making changes. If possible a select a region method might be good, but I can imagine that would be hard on a browser.

Describe alternatives you've considered

Additional context