The operators on this panel are explained from left to right.
The new layer operator creates new layer above the selected layer.
This operator moves the layer one position up.
This operator moves the layer one position down.
This allows you to preview the active layer's mask.
This allows you to isolate and preview the active layer without regard to any masks.
Preview Master Channels#
This opens a panel that allows you to preview all the layers of that specific channel on the active material.
Click HERE to learn more about master channel previews.
This removes the link from the normal input of the shader and can help with calculating faster with larger projects
Open UV Editor#
This will open a UV editor to the left of the active viewport.
This will delete the active layer. There will be a prompt before deleting, however if the you hold down SHIFT while clicking on the operator, the prompt will be overridden.