All of the graphics are scalable and you can change the size of all text within if you wish.
These Shark/underwater text styles are very easy to customize. Simply open the Smart Object layer in Photoshop and add your own text, press save and the style will be added automatically, you can even add shapes too.
You can change any colors and or fonts contained within the file if you wish.
To change the colors, simply edit the background layers by applying a color overlay.