To access the help system from within the Horizon Client app, tap the Option menu in the upper-left corner of the menu bar, tap the information icon (!), and tap the link under Online Help. You can also display the help system after you connect to a server or log in to a remote desktop or application.
The help system uses features of your Web browser, as well as some additional capabilities, to help you access product information. You can search the help using queries that contain quotation marks, wildcards, and Boolean operators.