There is no prescribed way to do this, so you’d need to build a process around it. In my mind, you could do this two ways:
- Action orientated. Like the image i shared before, where it says purpose, provide an “Action” picklist. If the user selects delete all, the presses submit then you could delete them all
- Action orientated with selection. Building on the above option, if the user selects “delete”, then you could show a data reference referring to the embedded data?
- This could be multi-select (multiple records) to allow delete certain ones (or select all)
- You could also do this without a data reference, see this little known configuration Using an Embedded Data List as a Picklist Source (with combo-box)