logiops settings for Logitech MX Anywhere 3 and 2 (/etc/logid.cfg)

logid.cfg

devices: ({
  name: "MX Anywhere 3";

  hiresscroll: {
    hires: true;
    invert: false;
    target: false;
    up: {
      mode: "Axis";
      axis: "REL_WHEEL_HI_RES";
      axis_multiplier: 1;
    };
    down: {
      mode: "Axis";
      axis: "REL_WHEEL_HI_RES";
      axis_multiplier: -1;
    };
  };

  dpi: 1600;

  buttons: (
    // Gesture button -> Middle button
    {
      cid: 0xc4;
      action = {
        type: "Keypress";
        keys: ["BTN_MIDDLE"];
      };
    },
    // Backward button
    {
      cid: 0x53;
      action = {
        type: "Keypress";
        keys: ["KEY_BACK"];
      };
    },
    {
      cid: 0x54;
      action = {
        type: "Keypress";
        keys: ["KEY_BACK"];
      };
    },
    // Forward button
    {
      cid: 0x56;
      action = {
        type: "Keypress";
        keys: ["KEY_FORWARD"];
      };
    },
    {
      cid: 0x57;
      action = {
        type: "Keypress";
        keys: ["KEY_FORWARD"];
      };
    }
  );
},
{
  name: "Wireless Mouse MX Anywhere 2";

  hiresscroll: {
    hires: true;
    invert: false;
    target: false;
    up: {
      mode: "Axis";
      axis: "REL_WHEEL_HI_RES";
      axis_multiplier: 1;
    };
    down: {
      mode: "Axis";
      axis: "REL_WHEEL_HI_RES";
      axis_multiplier: -1;
    };
  };

  dpi: 1600;

  buttons: (
    // Backward button
    {
      cid: 0x53;
      action = {
        type: "Keypress";
        keys: ["KEY_BACK"];
      };
    },
    {
      cid: 0x54;
      action = {
        type: "Keypress";
        keys: ["KEY_BACK"];
      };
    },
    // Forward button
    {
      cid: 0x56;
      action = {
        type: "Keypress";
        keys: ["KEY_FORWARD"];
      };
    },
    {
      cid: 0x57;
      action = {
        type: "Keypress";
        keys: ["KEY_FORWARD"];
      };
    }
  );
});

Install logiops first. This file results in fairly straight behavior:

• Forward button triggers KEY_FORWARD;
• Backward button triggers KEY_BACKWARD;
• Gesture button (the small button right below the wheel) triggers BTN_MIDDLE; and
• Wheel button does nothing.