Teacher presets let you save the configuration of the Gizmo, then load that configuration at any time.
Example: Say you are teaching with the Growing Plants Gizmo. Instead of re-creating the same Gizmo configuration (lights, water, seeds) over and over again, you could save it as a preset. This would let you setup your experiement by selecting it from the menu.
Working With Presets: The Gizmo can be manipulated as normal after a preset has been applied. To return to the default state, simply refresh the page.
Steps to Create a New Preset:
Modify the Gizmo until you reach the configuration you want to save.
Click the "Preset" menu, then "Add Preset".
Enter the preset name, then hit save.
Steps to Edit or Delete a Preset:
Hover your mouse over the preset you want to edit or delete, then click the icon that appears to the right.
In the menu that appears you can either delete the preset (red icon), or type in a new name and click "rename".