How about a quick tutorial? This works for links to posts here on site as well as links to other websites.
For posts here: right click the post number (top right of each post in the green bar) you want to link to (computer) or click and hold (phone) and click
Copy Link Location. Then go to the text you want to create as a link, highlight it, and click the Link button in the toolbar (looks like two pieces of chain), and paste in the copied link. Click
Insert. The text will be green and is now a link to the place you told it to go.
For links to other pages: same idea, but just copy the URL address from the address bar and paste
that into the Insert box.
Like
this, or
this.