Glasses only if clear and without reflections; better without them.
Print the sheet on 4 × 6 photo paper and cut along the guides.
How to do it with Requisito Listo
Open the «Schengen / Spain visa photo» template in the app.
Take the photo with the on-screen guide (or pick one from your gallery).
The app centers your face, makes the background white and gets the exact size and file weight.
Check the checklist, then upload or save it.
At the end you'll see a checklist: size, file weight, background and format. If something doesn't comply, it tells you what to fix before the portal rejects it.