Hotkey - Value only peek mode

[DarkOwnt]

I think it would be very useful to artists to have a value only peek mode (showing only a brightness grayscale version of the entire painting) and even more useful if it could be turned on with a shortcut key (could be used in the same way quick vertical and horizontal flip modes are used).

[HannahRage]

Noted

In the meantime, you can turn everything grayscale by either:

1. Single layer images: Go to Edit > Filters > Adjust Layer Colors and drag 'Color' over to 0%

2. Multi-layer images/editions without filters: Add a solid black layer, go to Layer Blend Modes, set it to Color.