The Link, or Link Picker, dialog controls Link Management or the action performed when hyperlink text or an image is clicked by the user. At its most basic the Link will take the user to, or open, another page in the app or to another web resource. However, more sophisticated controls are also provide, some of which are context aware.

Link Functions

• Link to Local Page
   
• Link to Local Relative Page
   
• Link to Perform an Action within the Page
   
• Link to a Document
   
• Link to an External URL
   
• Link to Change Domain

Link to a File

The link to File (was Document) makes it simple to allow the user to download a document or file to their local machine.

Common examples are PDF, text and .csv files and also executable (.exe) files

We've allowed most file types to be uploaded, but there are some we rename so that they won't run as executable web pages, so .asp / .aspx / .nc / .php all get silently renamed with an extra extension to make them harmless.