Go to edit mode, click on the web part to show edit controls. Then, click on Add button

add_link


If the web part is connected o a list, just fill the link's information on the form, then click save

add_link_form


If the links source is "Save to this web part", then just get the link using the following data sources

  • Recent documents
  • Stock images
  • One drive
  • Site collection
  • Upload a file
  • From a link

file_picker


If adding a link from an URL, the web part will automatically fill some useful information, like, the Title, Description and Image. This can be edited later.

edit_link