To delete the content of an issue from your device:
1) Navigate to the Library screen.
2) Tap and hold down on the issue you want to delete the content for 2 seconds until the issue is highlighted in red.
3) You will see a minus button appear at the top right corner of the screen.
4) Tap the minus button to delete the content for the selected issue from the device.
5) Note, the issue content will still be available in the library to download should you wish to view that content again in the future.