Enlarge campaign gift email logo

The receipt layout gives a custom email-template/project logo a maximum width of 400 px, while the fallback school logo is capped at 200 px. Use the supported custom logo for the applicable receipt template/campaign rather than expecting the school fallback to enlarge, and upload a clean image with little surrounding whitespace. These are maximum widths, not guaranteed upscaling. If the logo still looks too small, send Support the actual asset and a screenshot of the received message.