You can create your own buttons and timers outside of Eko Studio and upload them to the Library.

Image Button

Screen Shot 2015-07-21 at 2.37.08 PMYou can upload an image (in a supported format) to Eko Studio and then drag it from the Library directly onto the button. From there you can adjust the transform settings of the button as you wish.

Button/Timer Skin Style

In Eko Studio, you can adjust the elements themselves and edit their settings in the Style tab Options. You can also save and re-use Design Presets for buttons and timers.