The Help Toolbar

Buttons (from left to right):

Preferences Multiple configurations can be done through this command. For details about Configuration Window, please refer to Configuring Link Checker.
Project Navigator Shows or hide the project view navigator.
Check For Update Checks for available updates of Link Checker.
Help Contents Opens the user's manual. That is, this document. In the help dialog, select the Contents tab to see a hierarchical list of topics; the Index tab to view topics listed in alphabetical order, or the Find tab for a full-text search of the Help system.