Open your template in Adobe Acrobat Reader. This is VERY important. Do no try editing in your computer’s preview program. (Many computers will automatically open the file in your web browser or a preview program instead.)
Select the text in the highlighted area that you which to change and start typing.
To change the font, size or colour of the text, first select it and press ctrl + e (windows) or cmd + e (mac) to bring up the font properties box. Please check the following tutorial for more detailed information
Choosing a selection results in a full page refresh.