Open your document and select the text that you would like to insert a link into.
With your text highlighted, right click to bring up the options menu.
Select Insert Link from the menu that pops up.
You can type an address or select from the suggested options.
You can also add a link to text with a keyboard shortcut.
Press [[cmd]] + [[k]]
Now you can add a link by pasting the address, typing it, or selecting from the suggestions.