Presets

A preset keeps a background, a mark style and export settings together. Your list starts empty, with 12 starter looks ready to add.

To start from a ready look, open Settings › Presets and click Add under one of the 12 starter looks.
To save your own, open Presets in the editor's toolbar and choose Save Current Style as Preset….
To use one, pick it from the same menu. Manage Presets… opens Settings.
In Settings › Presets, choose Make Default so every new screenshot starts with it.

With no default, each screenshot starts with the settings you used last.