In the keynote program that comes with your Mac, you can turn text, images, and shapes into links, and when you tap those links during a presentation, they do any of the actions. Objects that have links appear in the presentation as if they were normal objects. When you type text in a text box or shape, Keynote automatically detects a valid URL (URL) or e-mail address in the text. (The address must follow a space, tab, or carriage return, or one of many punctuation marks, parentheses, and brackets). URLs and e-mail addresses become active and underlined to indicate that they are links.
If you do not want to Keynote automatically detect links, you can turn off smart links in edit Replace. Here's a tutorial on how to add links to keynote:
I. Adding links to text or objects
1. Control-click the selected text or object that you want to add a link to, and then choose Add Link.
2. Choose an option from the link to pop-up menu.
Slide Show: Link to another slide in the presentation. Click Go to slide to jump to the slide you selected.
Web page: links to Web pages in the default Web browser. Click Open to open the Web page you entered in the default browser.
Mail: Open an email with the address and subject you entered. Click Open to view a preview of the message information.
Exit Slideshow: Exits the presentation when you tap text or an object.
3. Provide the required information (for example, URL or e-mail address).
4. Click outside the dialog box to close it, or click Open to open the link.
Second, edit or remove links
You can perform any of the following actions:
Click the blue arrow in the lower-right corner of the object and make the appropriate changes.
Tap the link text, and then make the appropriate changes.
Third, close the automatic formatting of links
1. If you do not want to automatically format the link as a tap of text, you can turn off automatic formatting.
2. Choose "Edit", "Replace" "show replace". The Edit menu is located at the top of the computer screen.
3. In the Replace window, select the Smart link check box.
4. Tap a button to replace any formatting links that appear in the presentation, or to replace only the formatting links that appear in the selected text.
When you open smart links for a presentation, a tick appears next to smart Links in the Replace menu. You can uncheck this box to turn it off, but the existing link will not change unless you select the text that contains the link, and then follow the steps above.