The items under assist box are gathering presets.
They work similar to fishing presets.
First select the desired settings, press “New” button, and all your settings are saved into preset. After that you can quickly switch between presets with a single mouse click.
If you want to make adjustments to your preset, first select it, change the desired settings, and press “Overwrite”.
Gathering presets are a very recent addition, so they don’t have a dedicated guide section yet.
But they follow the same rules described under Fishing Presets.