On a tablet, a person can simply flip the screen whether a graphic is either Portrait or Landscape. When a GM hands out documents to their players around a physical table, the item is usually written or printed on portrait-oriented paper.

Tip: For a large translucent map overlay, reduce the image resolution to the lowest possible setting, uniformly scale the image dimensions to a smaller size than needed, and enlarge it after uploading to Roll20. Let’s compare the file formats against each other: The maximum upload size is 10MB for Free users, and 20MB for Pro and Plus users. The three available image file types that can be imported and used in Roll20 are JPG, GIF, and PNG. We also offer optimized assets through our Roll20 Marketplace. This can be accomplished by adjusting the resolution using image-editing software. Anywhere between the 70-150 DPI range should be adequate for your game images. If you want images to run smoothly in Roll20, we recommend keeping image resolution low. TL/DR: If you just drag these assets into your game, it will eat up your storage space. This means maps, character portraits, and handouts from commercial PDFs are going to be larger file sizes than necessary for a Roll20 Game.

Higher DPI (dots per inch) results in larger image file sizes and puts more strain on the processor to display the image. In order for graphics to be readable and crisp for print, the image resolution, or DPI (Dots per inch) has to be kept rather high, at least 300 DPI for most print-quality PDFs.

If you are playing from a commercial adventure pack, there is a high chance you are working from a PDF file.

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