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Getting Started
QUICK SETUP
For quick interactive setup instructions, go to the interactive setup guide.
For more detailed information, continue with the following detailed setup guide.
DETAILED SETUP
1. Make sure the mouse is turned on — the number 1 LED on the bottom of the mouse should blink quickly.
NOTE: If the LED is not blinking quickly, perform a long press (three seconds).
2. Choose how you want to connect:
Use the included wireless USB receiver
Plug the receiver into a USB port on your computer
Connect directly using Bluetooth
Open the Bluetooth settings on your computer to complete the pairing.
Click here for more details on how to do this on your computer. If you experience issues with Bluetooth, click here for
Bluetooth troubleshooting.
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3. Install Logitech Options Software.
Download Logitech Options to use all the possibilities this mouse offers. To download and learn more about Logitech Options, go
to logitech.com/options.
LEARN MORE ABOUT YOUR PRODUCT
Product Overview
1 – MagSpeed scroll wheel 6 – USB-C charging port
2 – Mode shift button for the scroll wheel 7 – On/O button
3 – Gesture button 8 – Darkeld 4000DPI sensor
4 – Thumb wheel 9 – Easy-Switch & connect button
5 – Battery status LED 10 – Back/forward buttons
Pair to a second computer with Easy-Switch
Your mouse can be paired with up to three dierent computers using the easy-switch button to change the channel.
1. A short press on the Easy-Switch button lets you switch channels. Select the channel you want and go to the next step.
2. Press and hold the Easy-Switch button for three seconds. This puts the mouse in discoverable mode so that it can be seen by your
computer. The LED will start blinking quickly.
3. Choose how you want to connect the keyboard to your computer:
Bluetooth: Open the Bluetooth settings on your computer to complete the pairing. You can find more details here.
USB receiver: Plug the receiver to a USB port and open Logitech Options. In Options, selectAdd devices > Setup Unifying
device, and follow the instructions.
MagSpeed adaptive scroll-wheel
The speed-adaptive scroll wheel shifts between two scrolling modes automatically. As you scroll faster, it will automatically shift from
line-by-line scrolling to free-spinning.
Line-by-line (ratchet) mode — ideal for precise navigation of items and lists.
Hyper-fast (free-spin) mode — near-frictionless spinning, letting you fly through long documents and web pages.
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Switch modes manually
You can also manually switch between modes by pressing the mode shift button.
By default, mode shift is assigned to the button on top of the mouse. Use the Logitech Options Software, to disable SmartShift if you
prefer to stay in a single scrolling mode and shift manually. You can also adjust the SmartShift sensitivity, which will change the
speed required to automatically shift into free spinning.
Thumb wheel
Scroll side to side eortlessly with a stroke of your thumb.
Install Logitech Options software to extend thumb wheel capabilities:
Adjust thumbwheel scrolling speed, and direction
Enable app-specific settings for the thumbwheel:
Zoom in Microsoft Word and PowerPoint
Adjust brush size in Adobe Photoshop
Navigate your timeline in Adobe Premiere Pro
Switch between tabs in the browser
Adjust volume
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Assign custom keystrokes to the wheel rotation (up and down)
Gesture Button
Install Logitech Options software to enable gestures.
To use the Gesture button:
Hold down the Gesture button while moving the mouse left, right, up, or down.
Gesture Button Windows 10 Mac OS
Single press O Task View O Mission Control
Hold and move
down
↑ Start Menu ↑ Mission Control
Hold and move up ↓ Show/hide desktop ↓ App Expose
Hold and move
right
→ Switch between desktops → Switch between desktops
Hold and more
left
← Switch between desktops ← Switch between desktops
You can use gestures for desktop navigation, app management, pan, zoom, and more. You can assign up to ve dierent actions to
the Gesture button. Or map gestures to other MX Master buttons, including the middle button or manual shift button.
Back/Forward buttons
Conveniently located, the back and forward buttons enhance navigation and simplify tasks.
To move back and forward:
Press the back or forward button to navigate web or document pages, depending on the location of the mouse pointer.
NOTE: On the Mac, enabling of the back/forward buttons requires installation of Logitech Options software.
Install Logitech Options software to unlock new capabilities for the back/forward buttons.
In addition to enabling the buttons for use with Macs, Logitech Options software lets you map other useful functions to the buttons,
including undo/redo, OS navigation, zoom, volume up/down, and more.
App-Specic Settings
Your mouse buttons can be assigned to perform dierent functions for dierent applications. For example, you can assign the thumb
wheel to do horizontal scrolling in Microsoft Excel and zoom in Microsoft PowerPoint.
With Logitech Options, you can install predened app-specic settings that adapt the mouse button behavior to be optimized in
selected applications.
The following app-specic settings have been created for you:
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1 2 3
Default settings Middle Button Horizontal scroll Back / Forward
Browser
(Chrome, Edge,
Safari)
Open link in a new
tab
Switch between tabs Back / Forward
Microsoft Excel
Pan
(Hold and move the
mouse)
Horizontal scroll Undo / Redo
Microsoft Word
Pan
(Hold and move the
mouse)
Zoom Undo / Redo
Microsoft PowerPoint
Pan
(Hold and move the
mouse)
Zoom Undo / Redo
Adobe Photoshop
Pan
(Hold and move the
mouse)
Brush size Undo / Redo
Adobe Premiere Pro
Pan
(Hold and move the
mouse)
Horizontal timeline
navigation
Undo / Redo
Apple Final Cut Pro
Pan
(Hold and move the
mouse)
Horizontal timeline
navigation
Undo / Redo
With these settings, the Gesture button and the wheel mode-shift button are keeping the same functionality across all applications.
Each of these settings can be customized manually, for any application.
Flow
With Logitech Flow, you can work on multiple computers with a single MX Master 3.
You can use the mouse cursor to move from one computer to the next. You can even copy and paste between computers, and if you
have a compatible Logitech Keyboard, such as MX Keys, the keyboard will follow the mouse and switch computers at the same time.
You will need to install Logitech Options software on both computers and follow these instructions.
Battery
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Charge mouse battery:
Connect one end of the provided charging cable to the USB-C port on the mouse and the other end to a USB power source.
A minimum of 3 minutes charging gives you enough power for a full day of use. Depending on how you use the mouse, a full charge
can last up to 70 days.
NOTE: Battery life may vary depending on user and operating conditions.
Check mouse battery status:
Three LED light on the side of the mouse indicates battery status.
Install Logitech Options software to receive battery status notications, including low-charge warnings.
LED Color Indications
Green From 100% to 10% charge
Red 10% charge or below
Pulsing green While charging
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