Samsung SPH-I300 - Manual (Page 51)

Section 4
48 Entering Information into the Handheld Comput-
Writing Symbols and Extended Characters
To write symbols and characters, you simply activate the
Symbol shift. When the symbol shift is activated, a slash mark
is displayed in the bottom right hand corner of the screen, just
above the Graffiti area. The next stroke after the symbol shift is
the desired symbol character. The symbol shift is done by
tapping and dragging the stylus from the top left to the lower
right corner of the Graffiti alpha area.
Here is a chart of how to write Graffiti symbols: