After clicking on print
Select use existing print frame
Here you will see a list of all your existing print frames, as well as any created by members of your organisation.
In the search area you can search by user name, user email, map or frame name.
Select the existing frame that you want to use and select customise print.
From this screen you also have the ability to rename any frames that you have created.
To do this click on the three vertical dots and select rename.
Insert your new name and click on save.