Link Selection Tab
This section lets users select an internal destination page (an existing page on the current website) or a pre-formatted script (close window, next/previous page, print, etc.) for the link being created.
Allows users to manually enter an external website URL, email address, or other custom link (HTTP, HTTPS, MAIL, LOCAL, JS).
Window Options Tab
This section allows users to choose how a link opens when it is clicked (same window/tab, new window/tab, pop-up window).
Clicking on "In a pop-up window" enables the pop-up settings section, in which users can customize the pop-up window's size, position, and display options.
Expert: This section allows users to select a rel attribute to specify the relationship between the current page and the page being linked to. Rel attributes also serve to give search engine bots information about a website's links.