When worksharing is enabled, items will sometime get placed in the wrong workset or you may notice that something in a section view needs to be moved.
When you go to make changes the element may not play ball because it is protected by the workset it is in that you don't currently have ownership of.
A quick way to claim ownership of the element is to click on the worksets icon (circled in red).
If you are really old it may remind you of the video game Q-bert.
Once you click the icon you now have permission to make changes to the element with no more fuss.