Little Big Mouse
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Little Big Mouse now has a home of its own: littlebigmouse.mgth.fr — what it does, downloads, and guides, always in sync with this repository.
⚠️ Warning! Note that littlebigmouse.com is not affiliated with this project. It is used to distribute malware. We don't operate that site, don't know who does, and can't vouch for anything it publishes. If you have some time to help, please report it to google or other search engines.
The only official sources for Little Big Mouse are this repository — with its Releases page — and littlebigmouse.mgth.fr.
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🐧 New: Little Big Mouse is on the AUR
Arch Linux users get a real package — no more cloning and building by hand:
paru -S littlebigmouse # or: yay -S littlebigmouse
It builds from the tagged sources and ships the desktop entry, the icon and the udev
rule for /dev/uinput. One manual step remains — joining the input group — see
Linux.
[!IMPORTANT]
🎉 5.6.0 is out!
Your monitors land where Windows has them. The automatic placement lost the vertical offset between neighbouring screens, so a monitor sitting a little higher than the one beside it came out stacked a whole screen height away — and the first layout you were shown never matched what Place from windows config gave you afterwards (#531). Both are fixed, and the two directions now round-trip.
Border resistance, drawn where you want it (#522): sections along any edge, each with its own resistance, and separate settings for moving and for dragging a window. Live update (#525) sends your changes to the mouse engine as you make them, so you can feel a layout before keeping it — pick it from the arrow next to the apply button. And when a layout traps the cursor somewhere you cannot click, hold Ctrl+Alt+Shift+M to get the mouse back (#528) — configurable in the options.
Closing with unsaved changes now asks first (#530), and the C++ hook is gone: the Rust daemon is the only one, and the test suites finally run in CI (#524).
⬇ Download 5.6.0 — requires the .NET 10 Runtime (x64).
The rescue shortcut is Windows-only for now; the Linux release follows separately.
Something not working? Tell us 🙏
Little Big Mouse (LBM) is an open-source software designed to enhance the multi-monitor experience on Windows 10 and 11 by providing accurate mouse screen crossover location within multi-DPI monitors environments. This is particularly useful for setups involving a 4K monitor alongside a full HD monitor.
Donations
If you find Little Big Mouse helpful, consider supporting the project with a donation. Your contribution helps us maintain and improve the software.
Presentation Video
Check the very nice video from Touble Chute (a very big thanks to him):
Features
- Smooth Mouse Transitions: Ensures smooth and accurate mouse movement across screens with different DPI settings.
- Screen Looping: Lets the cursor wrap around the desktop — leave the last screen and re-enter from the first, horizontally or vertically.
- Display Size Adjustments: Allows for adjustments in the relative sizes of displays.
- Border Resistance: Allow some resistance before crossing.
- Rescue Shortcut: A keyboard way out when a layout leaves the cursor somewhere it cannot escape — the one recovery that does not need a click.
- Live Update: Feel a layout while you edit it. Changes go straight to the mouse engine as you make them, without being saved, so you can try a resistance or a position with the real mouse instead of applying it and undoing it.
- Display Color and Brightness Balancing: Offers control over color and brightness profiles of displays.
- Access to Display Debugging Information: Provides detailed information from your displays and drivers.
Installation
- Download the latest release from the Releases page.
- Run the Little Big Mouse installer from your computer.
- (Optional) Change the default installation path.
- Follow the installation progress and complete the installation.
- Access the program from the Start Menu.
Linux (experimental)
The Linux port works, but is still experimental. Mouse routing uses an evdev/uinput
backend — it grabs the physical mice and drives a virtual pointer, exactly like the
Windows hook — with Wayland-portal and X11 fallbacks. It is developed and tested on
KDE Plasma 6 (Wayland); feedback from other desktops is very welcome on the
issues page.
Arch Linux — install from the AUR
This is the beginning of the README. Read the rest at the original. Read the full README ↗
