Gradia

Gradia helps you get your screenshots ready for sharing, whether quickly with friends or colleagues, or professionally with the entire world.

Key features:

- Add optional image and gradient backgrounds to your images
- Adjust aspect ratios and padding to fit different platforms
- Ten annotation modes, including text, arrow, and censor
- Multiple ways to import and export screenshots
- Quick upload button for image services like Imgur

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Want a keyboard shortcut on GNOME?
Simply go to Settings → Keyboard → View and Customize Shortcuts → Custom Shortcuts.
Then create a shortcut that runs:

gradia --screenshot=INTERACTIVE