The descriptions that follow refer to the standard Help buttons. You cannot remove the standard Help buttons. However, you can change the function of the standard buttons or add additional buttons to the button bar. Help authors can create up to 16 additional buttons for a total of 22 buttons (including Browse buttons).
Custom buttons can have as many as 29 characters, after which Help truncates the button name. Help determines the size of all the buttons based on the longest name and the default button size (determined by the longest standard button name—Contents). So if you assign long button names to custom buttons, the size of all the buttons in the button bar will increase.
Customizing the Help button bar involves a number of Help macros, such as ChangeButtonBinding to modify the standard buttons, CreateButton, DestroyButton, EnableButton, and others to create and modify custom buttons. For complete details about how to create your own custom buttons, see Chapter 13, “Customizing the Help File.”