Change the font of the code editor: Tools -> Options -> Enhanced Editor.
Change the font of the data table view: Add
-SYSGUIFONT "Consolas" NORMAL 11 to the SAS command line.
Change the font of the treeview and menu, etc. : This is controlled by Windows, not by SAS. If you want to increase text size without making everything bigger, see Change the size of text in Windows 10. This seems crash SAS Windows on my machine…