How to customize

You can easily customize GeoGebra Calculators by setting these and many more parameters.
To see how to set parameters have a look at Math Apps Embedding
There's also a full list of App Parameters

Custom Toolbar

Create a custom toolbar by entering a sequence of tool numbers.
Try entering this example: 0 1 2 10 16
List of Tool Numbers

Load a File with ID

All Calculators can be pre-populated with content.
Try entering this example: actap33e