Select the File menu from the top-left corner of the screen in PaintTool SAI. Select "Save As," then "JPEG" and "Desktop."
Open another program that allows typing text on graphics. Microsoft Paint works well for this option, as well as Microsoft Word or Publisher.
Select the File menu, then "Open." Select the JPEG file you saved to the desktop.
Click the Text tool and draw a text box. Click inside the box, and type the text.
Press "Ctrl" and "S" or select "File" then "Save" to save the file.
Select the Pen or Paintbrush tool.
Use your tablet or mouse to draw the letters.
Erase and redraw as necessary. This may take some time and patience to make them look the way you want them to, especially using a mouse.