I've been moving point labels around in qgis3, and I wonder if there are some way to back all them to their default position. And beyond: Can I switch between label ubications? Lest's imagine I want them over the point sometimes and others linked to the point with a line, but away from the point. I already know how to make the line link.
This feature turns on the 'data-defined' settings for label placement and uses an in-memory column called AUXILLARY_STORAGE_LABEL_POSITIONX and Y.
Seems the option to clear these is hidden, but:
Where the COORDINATE X and COORDINATE Y elements are activated, click the ASSISTANT option to turn this feature on.
Click the BACK button to go back to the main label panel.
There is now an option to CLEAR the values being used by the AUXILLARY_STORAGE_LABEL_POSITIONX and Y columns. Click CLEAR and the labels will reset their position.