A mask cannot be locked.

Understand the Problem

The question seems to address the issue of a mask that cannot be locked, which could relate to a technical difficulty or functionality issue. It may pertain to how to resolve this issue or the reasons behind it.

More Information

In Adobe After Effects, both layers and masks can be locked to prevent accidental edits. Locking a mask restricts any movement or change to the mask until it is unlocked.

Tips

A common mistake is confusing the locking functionality of masks with layers, leading people to think masks cannot be locked.

Sources

• Suddenly unable to move path handles of Mask Path - community.adobe.com