Is your feature request related to a problem? Please describe.

• Sometimes I have several ideas for a shot and I'm not sure yet what is the best one.
  I want to be able to draw the different boards then choose which one is the best.
• Or If I do delete some boards, I might regret it and want to go back.

For those reasons, I don't want to DELETE those boards. I just want to mute them.

Describe the solution you'd like

The idea would be to have a "mute board" option.
When a board is muted, it

• does not export
• does not play when playing the timeline
• is skipped when moving in the timeline with the arrows (you'll have to click it to edit/show it)
• is ignored in the boards incrementation

There could also have an option "hide muted boards" in the view menu.

Describe alternatives you've considered
Be able to switch between different versions of a drawing when editing a shot.
The problem with this is that you can only switch the picture, not the boards informations (timing, action, etc) - so it only works for a same idea.