1) Select your desired text you wish to make a link in the WYSIWYG. Utilize the Link button on the editor tool bar. There is a delete link next to the link button also highlighted below:
2) In the link pop-up, Select Browse Server highlighted in the below image to add an attachment.
3) You need to be in the files folder and not the images folder. From here, you can select a previously uploaded file or add a new. To add a new selection “Upload”.
4) UPLOAD FILES: Tap the Add Files green button (1) to browse your computer to find your file & select “Open” to add the file to the system. You can also drag and drop the file into the main box to add the file Then tap Upload FIles (2). Once uploaded, return to the files list (3).
5) Then select the desired file.
6) If you would like the attachment to open in a new browser window, goto the Link Tab and change the selection to New Window (_blank). When you have completed, select OK to add the link.