The context menu appears when you right-click a layer.
The following options are available for all editable layers in the USD Layer Editor:
When a layer has unsaved edits, an asterisk appears at the end of the layer name. Select Save Edits to save edits to an existing layer.
Reload a layer and discard any unsaved edits on that layer. This option lets you see any updates made to that layer outside the current 3ds Max session. If the layer has unsaved edits, a warning appears for you to confirm if you want to discard all the edits on the layer and reload it.
Load one or more existing layers as sublayers of the selected layer.
Mute a layer. When a layer is muted, it's ignored by the stage and the contents of the muted layer disappear in the Viewport and Scene Explorer. Muted layers do not participate in value resolution or composition.
Lock a layer. When a layer is locked, you can't target or add sublayers to it. If a locked layer has sublayers, they can't add new parent layers to them.
Print the content of a layer to the Scripting Listener. To see the printed content, go to Scripting > Scripting Listener.
Clears all the contents of a layer, including unsaved edits and sublayers. The selected layer remains in the stage, but all of its contents are deleted.
Remove the layer from the layer stack.