You can call up the dialog at any time by clicking on the Authenticate/change user [Authenticate/switch users] button.

If several roles are provided for a user (this is the case in the training environment), the Select group button is also displayed.

Click on the button to open the Select role dialog box.

Select the desired role here and confirm with OK.

If the user rarely selects a role, activate the Remember role selection [Remember selected role] checkbox. This saves the last role selected and suppresses the role dialog until the user clicks the Select group button again or the saved role is no longer available for this user (setting in plinkusers.cfg).