Edit and Remove Labels
To remove a label from your list of labels:
In a sketch, click the Labels icon (
) tab in the Sketch Panel on the right
At the bottom of the list of labels, click Edit List.
In the window that appears, select the label from the list, then do one of the following:
Click Edit to change the text for the label and click OK when you're finished.
Click Delete to remove a custom label from the list.
Only custom labels can be removed. The stock labels are permanent and can be edited, but not deleted.
When you're finished, click OK to save your changes and return to your sketch.

) tab in the 
