Should a group change be possible then the following second icon will show up.

Clicking this icon the adjoining dialog box appears.

Select the desired role here and confirm with OK.

If you mostly use the same role then you can activate the checkbox Remember selected role.

In this way the last chosen role is saved and the role dialog is suppressed as long as the user clicks on the Change role button again or the saved role is no longer available for the respective user (setting in plinkusers.cfg).