To add a hyperlink
Highlight the text you wish to link
On the floating toolbar that appears above the text, click the Link button. A textbox will appear where you can enter the URL
Enter the URL into the textbox
Click the tick icon and the link is inserted
To remove a hyperlink
Click the hyperlink on the page and a floting toolbar will appear above it
Click the remove button
To update a hyperlink
Click the hyperlink on the page and a floting toolbar will appear above it
Click the update button
Enter the new URL and click the tick icon