Within the full rich text editor (available when editing a process description, email template, instructions in a form question, etc.), you can add a hyperlink to text. Please note that the rich text editor that can be allowed on form questions (for users responding to those questions) does not give the option to add a hyperlink to text.
1. Highlight the text you would like to attach the link to.
2. Click on the link (chain) icon.
3. Enter the web address of the hosted document into the pop up box.
4. Click Insert
5. When you are finished the question will look like this: