# Mouse

Several mouse input modes are available:

 - `--mouse=sdk` (default)
 - `--mouse=uhid` (or `-M`): simulates a physical HID mouse using the UHID
   kernel module on the device
 - `--mouse=aoa`: simulates a physical HID mouse using the AOAv2 protocol
 - `--mouse=disabled`


## SDK mouse

In this mode (`--mouse=sdk`, or if the parameter is omitted), mouse input events
are injected at the Android API level with absolute coordinates.

Note that on some devices, an additional option must be enabled in developer
options for this mouse mode to work. See
[prerequisites](/README.md#prerequisites).


## Physical mouse simulation

Two modes allow to simulate a physical HID mouse on the device.

In these modes, the computer mouse is "captured": the mouse pointer disappears
from the computer and appears on the Android device instead.

Special capture keys, either <kbd>Alt</kbd> or <kbd>Super</kbd>, toggle
(disable or enable) the mouse capture. Use one of them to give the control of
the mouse back to the computer.


### UHID

This mode simulates a physical HID mouse using the [UHID] kernel module on the
device.

[UHID]: https://kernel.org/doc/Documentation/hid/uhid.txt

To enable UHID mouse, use:

```bash
scrcpy --mouse=uhid
scrcpy -M  # short version
```


### AOA

This mode simulates a physical HID mouse using the [AOAv2] protocol.

[AOAv2]: https://source.android.com/devices/accessories/aoa2#hid-support

To enable AOA mouse, use:

```bash
scrcpy --mouse=aoa
```

Contrary to the other modes, it works at the USB level directly (so it only
works over USB).

It does not use the scrcpy server, and does not require `adb` (USB debugging).
Therefore, it is possible to control the device (but not mirror) even with USB
debugging disabled (see [OTG](otg.md)).

Note: On Windows, it may only work in [OTG mode](otg.md), not while mirroring
(it is not possible to open a USB device if it is already open by another
process like the _adb daemon_).


## Mouse bindings

By default, with SDK mouse, right-click triggers BACK (or POWER on) and
middle-click triggers HOME. In addition, the 4th click triggers APP_SWITCH and
the 5th click expands the notification panel.

In AOA and UHID mouse modes, all clicks are forwarded by default.

The shortcuts can be configured using `--mouse-bind=xxxx` for any mouse mode.
The argument must be exactly 4 characters, one for each secondary click:

```
--mouse-bind=xxxx
             ^^^^
             ||||
             ||| `- 5th click
             || `-- 4th click
             | `--- middle click
              `---- right click
```

Each character must be one of the following:

 - `+`: forward the click to the device
 - `-`: ignore the click
 - `b`: trigger shortcut BACK (or turn screen on if off)
 - `h`: trigger shortcut HOME
 - `s`: trigger shortcut APP_SWITCH
 - `n`: trigger shortcut "expand notification panel"

For example:

```bash
scrcpy --mouse-bind=bhsn  # the default mode with SDK mouse
scrcpy --mouse-bind=++++  # forward all clicks (default for AOA/UHID)
scrcpy --mouse-bind=++bh  # forward right and middle clicks,
                          # use 4th and 5th for BACK and HOME
```