You may end up with a lot of drawings in your onion skin display while working with the Shift and Trace feature. You can disable individual drawings from the onion skin display without deactivating them.
How to enable and disable individual onion skin drawings
- In the Tools toolbar, click the Onion Skin
button.
- In the Drawing Desk, click on the drawing’s Onion Skin
button to enable or disable it. When enabled, the icon's 
colour changes .