What operating system do you have?
What photo application will you be using?
Try printing "Windows Photo Viewer" (Just click your photo & photo opens in Win Photo Viewer)
Open photo in Windows Photo Viewer (Or you can
right click photo and Select "Open With")
Select Print at top of Page
Select printer (ET2550)
Select Paper Size (5X7)
Select Quality (Best Photo)
Select Paper Type (Premium Photo Paper Glossy)
Insert Glossy or premium photo paper glossy into paper tray
See your printer manual of instructions (How To Load Photo Paper)
Click Print at bottom of page
If your Windows 10 does not have Windows Photo Viewer an alternate application "Photo App" will open
This link provides easy Photo print applications as well:
https://www.printerforums.net/threads/photo-applications-ez-pze-free.66429/