Sharps: These are drawn with four separate strokes, in a grid.
Flats: Drawn like a lowercase b, either in one continuous motion or in two separate strokes.
Double-flats: Drawn with two flats (lowercase b).
Double-sharps: Drawn like the letter X, in two strokes.
Naturals: Drawn in two strokes, like an L and then an upside-down L.
StaffPad will display accidentals if they are the result of a transposed score or transposition.