When using CKEditor to write/edit a document in eXo Platform, you can also:
Click
to open the
Insert link to a site page
form.

Enter the site title of the link in the Title field.
Enter the site URL manually, or you can also click to open a page containing all the sites in the same server, then select one that you want.
Click to view the site.
Click to accept inserting the site to the document.
Click
to open a page.

Click the plus before the document name, or click directly the document name in the left pane to
show the content in the right pane, or click
to upload a file from your local device.
Click content that you want to insert to the document.