If I want to quickly post or unpost multiple payments, do I have to use the Export tab?
We do recommend that you use the Export Template/Export Payments tab to post Payments. However, if you do want to lock Payments/Opportunities on a record by record basis, you can do it with some optional buttons.
CAUTION: There is no way to control who has access to a custom button on a layout. If the layout is accessible to all users, then all users will be able to post/unpost which may not be what you intend. Please review your organization's security settings and sharing model and decide what is best from there.