To add text to your slide, click on the Text button – this will open the Text Element dialogue box.
Here you will find all the formatting and appearance settings for your text element. Once you have completed all the fields as needed (the URL field can be left blank if you do not want it to be a link), click on the Add Element to Slide button in the lower-right corner of the dialogue box. The text element will appear on the Preview canvas, and will also be listed in the Element Animation Control section, which you can use to change the animation of the element.
You can edit this element (and any other elements you add) by hovering over it and making the Edit, Delete and Move controls appear. Moving the element is a simple case of clicking on the Move icon and dragging the element to your desired location. Clicking on the Edit icon will re-open the Text Element Dialogue box.