When importing PDFs:

✔ Allow users to choose “Add expandable writing margin”
➡️ Let us set how many cm to add on each side (top, bottom, left, right)
➡️ Let us select a background style (grid, lined, blank) for the expanded area
➡️ Optionally, allow us to choose whether the background layer appears above or below the imported PDF (this could be added later—no rush!)

🔥 This would create a perfect page layout with the PDF on one side and structured space to take notes, do calculations, or annotate clearly.

No more floating sticky notes or struggling with extra pages—just clean, customizable, and efficient.