Theme, what the canvas draws, and how sheets are arranged on it.
Three pages between them decide how the app looks: Theme, Display and Workspace.
Theme
Light, Dark, or Automatic to follow the system.
Accent colour, with Shade and Opacity to tune it.
Icon Size.
The app's theme and the sheet's appearance are separate. Dark Mode on the Display page
inverts the drawings; switching the app to a dark theme does not, and must not - a plan set
inverted by accident is unreadable.
Display
What the canvas draws:
Drawings, Quantities, Item Labels - your takeoff, on or off.
Page Borders, Page Tabs, Page Summary, Version - sheet chrome.
Dark Mode - inverts the sheet itself.
Preserve Colors - keeps the drawing's own colours when inverting, so red stays red.
Boost Contrast - for a faint scan.
Selection Color and Selection Blend - how a selected object is marked.
Show Point Ticks and Show Point Key - vertex marks while drawing.
Workspace
How sheets are arranged:
Columns or a Custom layout, with a Flow Direction.
Layout Spacing - the gap between sheets.
Grid Size, Grid Line Color, Hide Grid.
Canvas Theme - the background behind the sheets.
Collection Frame and Group Frames - the frames drawn around grouped sheets.