Ever had a dimension and been unclear as to what was actually dimensioned? If so there isn’t any need to start clicking elements on the screen to see if the dimension turns blue.  Instead right click on the padlock, regardless of if it is locked or not, and select “Show Related”

This will bring up a dialog box that will have options to cycle through the two objects that are being dimensioned by that dimension segment.

Of course there is always the option to “Edit Witness Lines” and this will display all elements that are being dimensioned by the string.