Theme
Molkit’s interface uses a single light appearance while you draw. There is no in-app switch to flip the editor between light and dark, and no keyboard shortcut for it. The place where light and dark actually matter is export: when you save an SVG, you can make the file adapt to the light or dark setting of whatever device opens it later.
No in-app theme toggle
The canvas editor does not provide a light/dark toggle. You will not find one in a menu, in the settings dialog, or on a key binding.
If you want your drawing itself to look different (different bond, atom, or background colors), that is controlled by the color scheme, not by a theme. See color schemes to change how your structure is colored, and presets for related appearance bundles.
What a theme would change vs. the color scheme
It helps to keep two ideas separate:
- Interface chrome and canvas background are part of the application’s appearance. These are fixed in the editor today.
- Your drawing’s colors (bonds, atom labels, charges, and so on) come from the active color scheme. Changing the color scheme is how you recolor the structure, and it works independently of any light/dark idea.
So if a structure looks too dark or too light for your needs, adjust the color scheme rather than looking for a theme switch.
Theme-aware export
The one place light/dark is a real choice is the SVG export dialog. When you enable the Theme-aware (light/dark) checkbox, Molkit writes a @media (prefers-color-scheme: dark) rule into the exported SVG. A viewer or browser set to dark mode then shows dark-appropriate colors, while a light viewer shows the light version, all from the same file.
If you want the export to always look the same regardless of the viewer’s setting, leave Theme-aware off. The PowerPoint-compatible option also drops the theme-aware CSS so that Office and Keynote render the file correctly. See SVG export for the full set of export options.