Highlight the text you would like to link from, and then click on the insert/edit link icon on the formatting toolbar. A pop up dialogue box will appear where you can enter the URL address of the page you would like to link to. The title provides users and search engines a bit more info about the link, and you can tick/untick the check box under the title depending on if you want the link to open in a new tab/window. In the bottom section of the pop up box, you have a few options to link to an existing page on your site. By typing in the title, you can search for a title of the post or page you would like to link to. The results will be displayed below the search form. You can click on one of the items in the lists of posts and pages, and the URL and title will automatically filled above. Click on the add link button and your text will automatically be a link. To delete a link, select your link in the editor and click on the unlink icon on the formatting toolbar. This will remove the link. Click on the preview changes button before publishing or click the publish button to publish the changes.