Select the button next to a clue to activate it. Then select from the list of locations to assign it to the clue. Note that this will clear the current text on the clue and set it to the locations name.

Click on the text to edit or delete.

Select from the list of colors which one you would like to use to set it as active. Then on the clue select what text you would like to highlight. Once the text is selected use right click.