Creating a Group of Speed Buttons
A series of speed buttons often represents a set of mutually exclusive choices. In that case, you need to associate the buttons into a group, so that clicking any button in the group causes the others in the group to pop up.
To associate any number of speed buttons into a group, assign the same number to each speed button's GroupIndex property.
The easiest way to do this is to select all the buttons you want in the group, and, with the whole group selected, set GroupIndex to a unique value.