All Files Enabling the Onion Skin T-SBFND-008-014 After enabling the Onion Skin, you can set the number of previous and next panels to view. You can set the onion skin to display up to three panels. How to enable Onion Skin Do one of the following: In the Onion Skin toolbar, click the Onion Skin button. Press Alt+O (Windows) or ⌘+Alt+O (Mac OS X). Select View > Onion Skin > Show Onion Skin. The Onion Skin for the previous panel will display in the Stage and Camera view in red, and the Onion Skin for the next panel will display in green.