Can the tip / payment fees option be changed?

You can switch between Tip and Payment Fees at any time, as many times as you like.

To make this change, go to Settings > Online Payment and click "Edit".

The change takes effect immediately and applies to all your Forms. This means you cannot enable Tip for one type of Form (e.g., Donation Campaigns) and Payment Fees for another (e.g., Membership Campaigns).