To change what the swipe actions do in Boxer for Android:
1. Tap on the button in the top right corner. This will open up a drop-down menu.
2. Tap on "Settings".
3. Select "Swipe actions" underneath the Mail section.
4. From the list of 4 options, select the swipe action you would like to change.
6. Tap on the bubble for the new action you would like the swipe to take.