In stead of using "Save changes" as the On Click event, you will need to call a Microflow.
That microflow will have to include the following
- Parameter - The object you are working with
- Activity - Commit Object/s (save the object)
- Activity - Close Page - (optional, if you want to close the form the user was working in)
- Show Message - Can display a message like "Your thing is saved!)
See below:
