Jump to Mobile
On Sketchbook Pro for desktop
In the Layer Editor, select the layer, tap-hold 
to open the Layer Editor marking menu. Here you can access tools for adding, deleting, renaming, merging, locking, showing and hiding layers, and duplicating layers.
On Sketchbook for mobile devices
Sketchbook for mobile devices doesn't have Layer Editor marking menu. Double-tap a layer in the Layer Editor to open the Layer Menu
