My Epson L3210 isn't recognizing legal size paper. What should I do?

First, ensure the paper is loaded correctly in the tray and the paper guides are adjusted to fit legal size (8.5 x 14 inches). Then, access the printer settings on your computer. In the 'Paper Size' or 'Page Setup' options, manually select 'Legal' or '8.5 x 14in' as the paper size. If it's still not working, you may need to customize a paper size within the printer driver settings. Go to 'Custom Paper Size' and input the dimensions accurately.