I have actually an .yaml file per device that is running fine. I would like to keep this file as is and create a new different file for testing. But the SAVE button seems not to have a file-naming possibilty. Nor I can not find a “Recall” to select any .yaml file here.
Click the 3 dots top right and download yaml. Then when finished testing just open the downloaded yaml in a text file and cut and paste it back into the original file. If you need to save the modified test yaml download before restoring the original.