Someone reported a problem yesterday. Their legend view was locked in the sheet. It could not be selected / moved or deleted. The view didnt have any View Title, as is typical of all legends on sheets.
As per our standard, all legend views are supposed to use the "Viewport - No Title" type. However, in this sheet, the user has hidden the viewport using the right click menu > Hide in View > Elements option.
Clicking on the yellow light bulb at the lower left corner of the drawing area revealed this hidden element, and after unhidden, it allowed to be moved / deleted, etc.