Summarize the following:
the image or snap a pic of it with your phone. If your drawing isn't already digital, you'll need it to be before you start scaling. Scanning often has better quality, but a phone picture taken with good lighting should do the trick if you don't have a scanner. Many programs, like MS Word, MS Paint, Photoshop, Apple Paintbrush, and Apple Pages, allow you to adjust the scale of a picture digitally. Copy and paste the image into your chosen program. For the highest quality and most accurate scaling, prioritize using a design program, like Photoshop or GIMP. This can usually be done by right clicking the image. In the drop-down menu that appears, find and click "Size and Position." In the resulting menu, select "Lock aspect ratio" and "Relative to original image size." Some programs may use different wording for these options. Feel free to play with settings in the "Size" menu to see how changes affect the image. If you have difficulty finding "Size and Position" try looking for scaling options in the properties of the image or in an image formatting menu. Many programs represent the digital image size as a percentage. 100% indicates that the digital image is the same as the original, whereas 25% means the digital is a quarter the size of the original. When the percentage exceeds 100%, the image will become enlarged. Enlarging images may sometimes cause graininess or pixelation, especially with low-resolution images. After the image has been scaled, save a copy of the image or replace the original with the scaled one. If you need a physical copy of your scaled image, print it and you're all set.
Scan Insert the image into a suitable program or app. Navigate to the image layout options. Adjust the height and width under the "Scale" heading. Save the scaled image and you're done.