Segments and single LEDs

How do I create and delete segments from ioBroker, and can a preset use only part of the strip?

This section is still being written.

How many segments can I create if I want to control single LEDs?

This section is still being written.

How do I control single LEDs via JSON without segments?

This section is still being written.

How do I control several segments with one color picker?

This section is still being written.