Location: All Folders mode - right click on item - select Properties - select Browsing tab.
Open page in new tab: Check this box to display this topic in a new browser tab whenever it is opened.
Enable Popups: Check this box to enable popups to appear. Clear the check box to prevent popups. When checked, this setting will override the master popup blocker (which is on the toolbar) if it is set to block popups.
Apply settings to links on page: The enable popups setting (above) will be applied to any links followed from the topic .
Enable flash animation: Some popups are flash based. To prevent their appearance clear this check box.
Apply settings to child items: All the above settings will be propagated down to items further out on the branch.