This dialog displays in the context menu when you have multiple components selected in a drawing, and have used the Select Parent (Advanced) option to select the logical groups of the graphical components. It allows you to remove the logical groups from the selection set.

Select which Logical Groups to remove from the selection set and click Deselect.

While this option removes the logical groups from the selection set, the graphical components will remain selected in the drawing. To remove the graphical component(s) from a selection set, you can use the options in the Element Selection dialog.