1. Use the COLOR command. You can find help on its usage and the colors you can use on its help entry.
2. Write MML in the editor and press the help button. It will provide a basic tutorial on MML, the music-making language included with SmileBASIC.
3. Use the LOAD command, along with a font graphics sheet. Once you have your font sheet, you can load it like this...
LOAD "GRPF:<FontSheetName>"