The lockdown
Simillar has two locking options:
The scene lock
Object locking
Lock the scene
The first button in the manipulation bar locks the scene . Once activated (when the button is black), it is no longer possible to click on objects to select them. You can still move around, use tools, and add new objects.
Lock objects
You can also lock objects one by one using the second button on the manipulation bar.
When this mode is active, your cursor turns purple and you can click on objects to lock them . Locked objects then appear in purple.
When you disable this mode, locked objects remain unselectable. To unlock them, you will need to re-enable the mode and click on the purple objects to unlock them.
This button allows you to quickly unlock all objects.