With this feature you can create custom buttons on your detail pages that perform updates on the current record through a pop-up.
You specify which fields are to be updated as part of the action and also can set the value of the field to be updated.
The buttons may be conditionally displayed depending on user role or current field values.
Update: Action Buttons can now be configured inline - you can edit them directly from the page button list on the detail page itself.
This feature is currently in beta. Please contact support if you wish to have it activated on your app.