ModX - Add Link
To add a link on a ModX generated page, do the following:
Search for the file you wish to edit. When you see it, click on the file icon, not the file name and a menu of options will appear. Click on "Edit document".
In the document content area, begin by selecting the text or typing the text you wish to make a link. Then, click the link button (10th over from the right) and a window will open. In that window, either type in the url you wish to use for a link or, if it's a ModX document, search for it in the drop down "Link List".
Please note! the ModX document must be published in order for it to appear in the drop down list.
That's all there is to it! Remember to save the document before leaving the editor.