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.
3. Install Logi Options+ Software.
   Download Logi Options+ to use all the possibilities this mouse offers. To download and learn more about Logi Options+, go to logi-options-plus.

Pair to a second computer with Easy-Switch

Your mouse can be paired with up to three different 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 Logi Options+. In Options+, select Add devices > Setup Unifying device, and follow the instructions.

Please note that Easy-Switch can now be set up from the Actions Ring and switch two Logitech devices at the same time. For detailed instructions on how to set up Easy-Switch in the Actions Ring, please refer to this article.

LEARN MORE ABOUT YOUR PRODUCT

Product Overview

Haptic Sense Panel

The new Haptic Sense Panel has two main functions:

• Built-in, customizable haptic feedback for intuitive control and precision. For detailed instructions on how to customize haptic feedback, please click here.
• Clicking the Haptic Sense Panel opens Actions Ring that lets you access your favorite shortcuts. For detailed instructions on how to set up the Actions Ring, please click here.
  NOTE: Logi Options+ is necessary to use the Actions Ring.

There are two ways to select a bubble on Actions Ring, as illustrated below:

• Option 1: Push and release the Haptic Sense Panel → The Actions Ring opens → Hover over a bubble and then left click.
• Option 2: Push the Haptic Sense Panel without releasing it → Hover over a bubble → Release it on the bubble.

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.

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 Logi 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.

The scrolling force can also be adjusted.

Thumb wheel

Scroll side to side effortlessly with a stroke of your thumb.

Install Logi Options+ software to extend thumb wheel capabilities and more:

• 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
  • Assign custom keystrokes to the wheel rotation (up and down)

Gesture Button

Install Logi Options+ software to enable gestures.

To use the Gesture button:
Hold down the Gesture button while moving the mouse left, right, up, or down.

You can use gestures for desktop navigation, app management, pan, zoom, and more. You can assign up to five different actions to the Gesture button. Or map gestures to other MX Master 4 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 Logi Options+ software.

Install Logi Options+ software to unlock new capabilities for the back/forward buttons.

In addition to enabling the buttons for use with Macs, Logi Options+ software lets you map other useful functions to the buttons, including undo/redo, OS navigation, zoom, volume up/down, and more.

8000 DPI sensor

Install Logi Options+ software to enable the new capabilities of the Darkfield 8000 DPI Sensor
By default, the MX Master 4 has a 1000 DPI configuration.

In the Logi Options+ Software, you can extend the sensor range to up to 8000 DPI.

Enabling this option will allow you to work faster and more precisely, allowing you to adjust the pointer speed to match high resolution monitors.

App-Specific Settings

Your mouse buttons can be assigned to perform different functions for different applications. For instance, you can assign the thumb wheel to do horizontal scrolling in Microsoft Excel and zoom in Microsoft PowerPoint.

When installing Logi Options+ , you will have the possibility to install predefined app-specific settings that will adapt the mouse button behavior to be optimized in selected applications.

Here are the app specific settings we have created for you on the mouse itself (scroll down to learn more about the Actions Ring app-specific customization):

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.

To customize your Actions Ring in your favorite apps, please refer to this article.

Flow

With Logitech Flow, you can work on multiple computers with a single MX Master 4.

With Logitech Flow, 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 Mechanical, the keyboard will follow the mouse and switch computers at the same time.

You will need to install Logi Options+ software on both computers and follow these instructions.

Battery

Recharge mouse battery:

Connect one end of the charging cable to the USB-C port on the mouse and the other end to a USB power source.
A minimum of three 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:
The LED on the top of the mouse indicates battery status.

Install Logi Options+ software to receive battery status notifications, including low-charge warnings.

How to clean your device

Please refer to this article to learn more about cleaning your device.