Get the print you intended.

Start with the failure you want to avoid. Each guide includes a worked example, a decision you can make, and the limits of the calculation.

• A 4×6 photo on 8×10 paper: what gets cut, and how to keep it

  A 3000×2000 example shows the exact crop, the white-border alternative, and why adding an equal border changes the crop again.

• Why saving a photo at 300 DPI does not fix low resolution

  Follow a 1200×800 photo through three print sizes, then distinguish a metadata change from an upsampled export before spending money on a print.

• Borderless printing cuts off edges—even when the photo ratio matches

  Separate ratio cropping, borderless expansion, physical trimming and frame coverage with a controlled proof instead of repeatedly resizing the photo.

• Scanning a 4×6 photo for an 8×10: 300 or 600 DPI?

  Calculate scan resolution from the retained paper area, including a tight face crop, and avoid double-counting enlargement in scanner software.

• Print a PDF at actual size: an A4 and Letter ruler test

  Download a 100 mm proof square, diagnose unexpected scaling, and calculate whether exact-size artwork fits your printer's usable page area.