The menu and settings

Click the half-filled circle in the menu bar. The menu holds what you reach for often; everything else is in Settings….

Item What it does
The first line What is showing now, for example Waves in Dusk, Halftone.
Shuffle A new picture now. See Shuffling.
Pause Leave the desktop alone: Undertone sets nothing until you turn it off.
Hide the Notch A black menu bar strip the notch disappears into. See Notch and corners.
Round Corners Black outside rounded corners, so a window tiled into a corner meets black.
Settings… Everything else, below.
Open Config File Opens config.toml, writing it first if there is none. Below it, the first problem in the file, if there is one.
Check for Updates… Look for a new version now. See Updates.

Each page shows the picture showing now at the top, drawn with the settings as they are, with its name, its effects and a Shuffle button. Every change applies straight away and is written to the config file.

The Picture page: the preview, and every style drawn in the current tonality, two of them left out of shuffles

Page
Picture Style and tonality: each shuffled among those you leave checked, or always the same one. Every style and tonality is drawn, so you choose by eye. See Shuffling.
Effects The vignette, grain and the seven effects, each on or off with its own settings and a picture of it; and a random effect on each shuffle. See Effects.
Schedule Shuffle every hour, 3 hours or day, and on login and wake.
Screen One picture on every space or a picture per space, hiding the notch, rounded corners.
Title A centred title and subtitle.
Lock Screen Motion Your picture in motion while locked, and its speed, movement and settle. See Lock screen motion.
General Open at login, updates, and where the config file is.