nDon’t put pop-up hot spots within pop-up windows. Pop-up windows are nonmoveable, nonsizable windows that remain on the screen until the user dismisses them. Pop-up windows typically contain definitions of terms or other parenthetical information. Good uses for pop-up windows include illustrations, examples, notes, tips, and lists of keyboard shortcuts.
nDon’t put pop-up hot spots within pop-up windows.
Help dismisses the existing pop-up window to display the new pop-up window. This can disorient the user.
nWhen using a pop-up window to define a user interface item, you should include a graphic, if possible, that shows the item being defined.
nRemember when deciding to use a pop-up window that the user cannot print the information in pop-up windows, that pop-up window titles don’t appear in the history list, and that the user cannot return to a pop-up window using the Back button.
nAvoid placing too much text in a pop-up window since not all of it may fit (Figure 4.x).