You can delete actions before you synchronize the data with PigVision Online.
If the phone has synchronized automatically you cannot change it, but if you do the synchronization manually, you can click on the synchronization icon in the top.
A list appears with actions and here you can swipe the action to the left and thereby delete it.
You can as well click on the event and edit data before synchronizing if you fx typed the wrong amount of liveborn.
If you need to make changes after synchronizing, these can be changed in PigVision Online.