You can turn on pre-selection highlighting for curves, segments, tangents, and keys in the graph view. This feature gives you visual feedback on what you are about to select.

To turn on pre-selection highlighting

1. In the Graph Editor menu bar, turn on Select > Pre-select Highlight.
   Tip

   You can change the highlight color using the Colors window. Select Window > Settings/Preferences > Color Settings, then change the Pre-selection highlight option in the Animation Editors section.