Here are some helpful videos that guides you to creating the best looking graphical interfaces for Neets Touch Panels, iPads & iPhones. The GUI can also be reached from compatible browsers. The Neets Control app for iOS / iPadOS can be found on the App store.
This video shows the difference between the Master page and the other normal pages:
This video shows how to create custom buttons:
This video shows how to add a custom slider:
This video shows you how to start your own custom library of graphical elements:
Exporting an image from a slider or a button, in order to do some external editing in e.g. Adobe Photoshop or other photo editing software is very easy, have a look.