How do you print a legal size paper on a mfc-7860dw?

To print on legal-sized paper using the Brother MFC-7860DW, first ensure that the legal paper is loaded into the lower tray. Then, in your print settings on your computer, select the printer and go to "Page Setup" or "Print Preferences." Choose "Legal" as the paper size option before printing. Finally, confirm the settings and proceed to print your document.