How do I set up Logitech Flow to move cursor and files between computers with the MX Master 3S?

Applies to / Last updated
Logitech MX Master 3S • Logi Options+ on Windows 10/11 and macOS 12+ • Same local network required • Last updated: 29 October 2025

Problem

You use more than one computer and want the cursor to glide from one screen to another, with the option to copy text or drag small files across. You are unsure how to enable Logitech Flow, arrange screens, sign in on each device, or fix issues like the cursor not crossing, file transfers failing, or Flow not detecting the second computer.

Solution

Install Logi Options+ on every computer, sign in with the same Logitech account, pair the MX Master 3S to each device, and enable Flow. Put the computers on the same local network, allow Options+ through any firewall prompts, arrange monitor positions inside Flow, then test moving the cursor to the screen edge. Turn on clipboard and file sharing if you want to copy items between machines.

Step-by-step instructions

1) Prepare each computer

1. Install Logi Options+ on every computer you plan to use.
2. Pair the MX Master 3S to each computer using Bluetooth or a Logi Bolt receiver.
3. Open Logi Options+, sign in with the same Logitech account on every computer.
4. Keep Options+ running in the background on all machines.

2) Put computers on the same network

1. Connect each computer to the same Wi-Fi or Ethernet network.
2. If you use a VPN, disconnect it temporarily or enable split tunneling for Options+ so local discovery still works.

3) Enable Flow

1. In Options+, select your MX Master 3S and go to Flow.
2. Toggle Share keyboard and mouse between computers to On.
3. Wait a moment while Options+ discovers your other signed-in computers.

4) Arrange screens and test cursor movement

1. In the Flow layout, drag monitors so their edges match your physical desk layout.
2. Move your cursor to the edge of Computer A that touches Computer B in the layout.
3. The cursor should cross over and the MX Master 3S will switch to the correct Easy-Switch channel automatically.
4. Repeat the test in the opposite direction.

5) Enable clipboard and file sharing

1. In Flow settings, enable Share clipboard to copy text and images across computers.
2. Enable File sharing if you want to drag small files across.
3. Test by copying text on Computer A and pasting on Computer B, then try dragging a small file across the edge.

6) Optional tuning

1. Adjust edge switching sensitivity or require a key modifier to cross, which helps prevent accidental switching.
2. Rename each computer inside Options+ for clarity.
3. Create app-specific profiles on each machine so buttons trigger the right shortcuts when Flow switches.

Optional methods or tools

• USB-A extension for Logi Bolt to improve receiver placement if one computer uses a dongle and suffers interference.
• Per-app window managers like PowerToys on Windows or BetterSnapTool on macOS to complement Flow with quick window tiling.
• Wired Ethernet on both machines to reduce discovery hiccups on congested Wi-Fi.

Best practices or tips

• Keep all computers awake and connected. Laptops that sleep or power-save their radios may delay Flow handoff.
• Allow Logi Options+ through your firewall when prompted. If you have a corporate endpoint, confirm that local network discovery is allowed.
• For reliability, sign in to Options+ with the same account everywhere and keep firmware and Options+ up to date.
• Flow works best when both machines are on the same subnet. If they are on different VLANs, consult your network admin about allowing local discovery traffic.
• Large file transfers are slower than a shared drive or cloud sync. Use Flow for quick items and a dedicated method for big files.

Logitech Flow makes two computers feel like one extended workspace. With the MX Master 3S paired to both machines and Options+ running on each, crossing the screen edge becomes second nature. Once clipboard and file sharing are enabled, you can copy text snippets, images, and small files without reaching for a USB stick or chat app.

If the cursor will not cross or files refuse to copy, start with basics. Confirm both computers appear in the Flow layout, that they are on the same network, and that Options+ has firewall permission. Temporarily disable VPNs, wake the target computer, and keep the receiver close to the mouse if you use Logi Bolt. Most issues resolve once discovery is allowed and both systems are awake and on the same network.