trainer bar architecture and components
The following functions are available to you in the trainer bar. The components listed below therefore represent the trainer's basic functionality.

- Orientation
This function allows to position the trainer bar optionally at the bottom of screen or at the top.
- Control
These buttons allow the way a lesson unfolds to be individually controlled.
- Text
This button enables you to set quickly if text bubbles shall be displayed or hidden.
- Audio
This button enables you to switch quickly between audio playback and silent mode. It only appears in lessons with audio enabled contents.
- Volume
This function allows you to control or deactivate audio file volume and bubble effects. Clicking on the button opens a selection menu from which the volume can be controlled and the sound deactivated by means of a selection field. It only appears in lessons with audio enabled contents.
- Progress display
The progress display provides an overview of the topics and displays how the lesson is progressing. Among other information, it displays the title of the chosen lesson and name of the topic currently being presented.
- Help
This button displays the help of trainer functionality.
- Close
The Close button terminates the mode and the trainer is closed.