If you’re a visual learner, you can colorize cards to provide yourself with clues. You can change the color of the individual cards in a stack by assigning a label to them:
- Select the stack containing the card you want to customize in the source list.
- Select the card you want to customize.
- From the menu bar, choose Card > Label and pick the label you want to use.
You can change label names in the Label preference pane.