Topic links:

These links create "jumps" to other help topics, which can be in the current help project or in other help projects or help files.

Topic anchors:

Anchors are not really links in their own right – they are "targets" for other links. They allow you to create a links that go to specific positions in a topic instead of to the top of the topic.

Internet links:

Links to HTML pages on the World Wide Web or email addresses.

File links:

Links to external files on the user's computer.

Script links:

These are not really hyperlinks in the real sense of the word. Instead of taking the user to another page or topic, clicking on them executes script code that you insert.

Named destinations in PDF:

When Help & Manual creates PDF files it automatically includes many types of targets as standard PDF "named destinations". You can use these destinations as targets for links from other applications and PDF documents.