How Do I Copy a Mask From One Layer to Another?

Copying a layer mask in Photoshop is super simple.  Hold down Option (Mac) or Alt (windows) & drag the original mask to its destination layer.

Can't figure out a simple way to do the same in Painter.

Official Corel instructions include only how to copy a mask to a channel and vice versa.  I've tried to play around with that, but it's not intuitive and I can't achieve the simple task of masking the same area on multiple layers - surely an incredibly basic function for art-creating software.

Corel Technical "Support" merely refers me back to those same instructions.

Any ideas?