Button labeled with an “Image” symbol, between “Zoom” and “Play” button in the upper screen bar
Also, I do not find any differences in the output (except that the predefined resolution or color depth changes) when selecting another target board in the preferences.
I must mention, that the docs do have massive potential for improvements. It is more or less only a
mirror of the widgets and IDE properties without any further explanation of use or other details, or samples. In the current version the docs are more or less useless (for me), as the details provided can be read from the IDE, too.