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.
Also in this series: an in depth look at section presets (video + notes) and creating local slider presets.
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.