Themes

TomoGUI ships with a bright and a dark theme.

Toggling

Click the theme button in the right-panel toolbar (next to the Min/Max contrast controls).

🌙 — currently bright, click to go dark
☀ — currently dark, click to go bright

Changes apply instantly to both Qt widgets and matplotlib plots. The selected theme is persisted to ~/.tomogui_settings.json and restored on next launch.

Customising

QSS stylesheets: src/tomogui/styles/themes.py
matplotlib styles: src/tomogui/styles/tomoGUI_mpl_bright.mplstyle and src/tomogui/styles/tomoGUI_mpl_dark.mplstyle
theme logic: src/tomogui/theme_manager.py

Edit the QSS block for the theme you want, restart TomoGUI, done.