Window Height Use this command to change the height of the QuickHelp window. The height is the number of lines QuickHelp occupies on the screen. You can reduce the height so that you can click topics outside the QuickHelp window by using a mouse. If you change the height, the new height will be in effect as long as QuickHelp is running. To make the new window height permanent, use the -l option in the QH environment variable.