You can make some or all of your hot spots invisible. Invisible hot spots appear as normal text to the user, but the Windows Help cursor changes to a hand pointer when it is over an invisible hot spot. Invisible hot spots are a useful way to create hot spots that look like regular text. For example, you may want to use invisible jump hot spots in a Contents topic to have better control over the appearance of the list. Or, you may want to use invisible pop-up hot spots in a Master Glossary topic where all the hot spots display a pop-up window with a definition.
Note:
Because invisible hot spots do not have any visible formatting to inform users, it is a good idea to tell them that there are hot spots on the screen.
To create an invisible hot spot
1.1.Follow the steps to create a standard jump hot spot, pop-up hot spot, or macro hot spot.
2.2.Insert a percent sign (%) as the first character of the context string (just before the exclamation point if it is a macro hot spot).
Note The percent sign must be formatted as hidden text.
Figure 8.x shows a correctly formatted invisible hot spot in a topic file.