Athanor by arbastro
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How to preview for color vision deficiency

Choose View › Color vision and a preview: protanopia, deuteranopia, tritanopia or achromatopsia. Choose it again to turn the preview off.

Steps

  1. Choose Main menu › View › Color vision.

    The Color vision submenu with four previews.The Color vision submenu with four previews.

  2. Pick a preview. The canvas is shown as it looks with that kind of color vision, and a message says whether any two colors in the drawing merge, for example "Deuteranopia preview. No two colors in the drawing merge."

  3. Choose the same preview again to turn it off. A check mark in the submenu shows which one is on.

Preview Simulates
Preview protanopia No red cones
Preview deuteranopia No green cones, the most common form
Preview tritanopia No blue cones
Preview achromatopsia No color at all

The preview changes only what you see, not the document or its exports.

Styles and journal formatsHow to use document colorsChoose Edit › Document colors… and Add a color. Each has a print and a projector value; switch Showing between Print and Projector, or use View › Switch print and projector colors.Workspace and settingsAccessibility settingsChoose File › Settings… › Accessibility and switch on Reduce motion, Larger targets or High-contrast selection. Alt+period and Alt+comma move through the atoms of a structure with the keyboard.

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Last updated Nov 12, 2026