Section presets are per-UI item (per-slider, per-plugin, etc) presets- they affect only the item which they belong to. This tutorial covers the basics of using the Section Preset UI Item to save and restore settings.
The project file for this tutorial can be downloaded here.
Step 1: Click the '+' button to store the current settings as a new preset.
One of the empty preset boxes in the UI will be filled with a new preset with an automatically assigned name.