Anchored Object Lock/Prevent Manual Position Override
The Prevent Manual Positioning creates a Locked Object, but unlocking the widget doesn't remove the Prevent manual override.
When you check to "Prevent Manual Override" an anchored object receives a lock adornment. An object Style can be created from this object. If that lock is unlocked the Object style shows as override, but the "Prevent Manual Override" is still checked.
If the object style is redefined. The lock adornment is still unlocked, and the "Prevent Manual Positioning" is still checked. Reapplying the style locks the object.
There should be more consistent behaviour of "Prevent Manual Positioning" and the "Lock". Even though they are similar they are not the same. If checking "Prevent Manual Positioning" activates the Lock. Unlocking should also uncheck "Prevent Manual Positioning".
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Adobe InDesign team
If a Text Frame is anchored AND locked, the "unlock icon" is not visible. So there's not any action available to directly unlock the Text Frame.
The current workarounds are
- Unlock all object in the spread.
- Release the anchor. Then the object is unlocked.