Each speed button needs a graphic image called a glyph to indicate to the user what the button does. If you supply the speed button only one image, the button manipulates that image to indicate whether the button is pressed, unpressed, selected, or disabled. You can also supply separate, specific images for each state if you prefer. 

You normally assign glyphs to speed buttons at design time, although you can assign different glyphs at runtime.

1. Select the speed button.
2. In the Object Inspector, select the Glyph property.
3. Double-click the Value column beside Glyph to open the Picture Editor and select the desired bitmap.