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Solaar usage

Under normal usage Solaar creates an icon in your system tray. This icon is usually a battery icon showing the approximate battery level for your device with the lowest known battery level. If there are no devices with battery information, then the icon is one of the Solaar icons.

Solaar also has a main window. When the main window is invisible, click on the icon in the system tray to bring up the menu, and then click on a receiver or device in the menu to see information about that receiver or device.

The following is an image of the Solaar menu and the icon (the battery symbol is in the system tray at the left of the image). The icon can also be other battery icons or versions of the Logitech Unifying icon.


Clicking on “Quit” in the Solaar menu terminates the program, and “About Solaar” pops up a window with further information.

Solaar options

There are several options that affect how Solaar behaves:

Solaar main window

The Solaar main window shows your Logitech receivers and devices that Solaar knows about and can be used to pair new devices, unpair paired devices, and view and change some settings of the selected receiver or device. To select a receiver or device click on it in the left side of the window.

Closing the main window does not terminate Solaar (unless Solaar is not using the system tray). Clicking on “Quit Solaar” terminates the program, and “About Solaar” pops up a window with further information. The light bulb (or a similar icon) displays detailed information about the selected receiver or device (useful for debugging).

Pairing and unpairing devices

When a receiver is selected in the main window, you can pair a new device by clicking on the “Pair new device” button. Then turn on the device and it should pair with the receiver if that is possible. For multi-host devices first select the host position that you want. Some Lightspeed devices may pair by pressing a special pairing button.


Some receivers can only pair with certain kinds of devices, other receivers pair a new device by replacing an existing paired device of the same kind, and even other receivers can only pair a limited number of times. A receiver with the Unifying logo should be able to pair with any device with the Unifying logo. If there are no open pairing slots, however, you may not be able to pair a new device. In this case to pair a new device you first need to unpair a device.

When a device is selected you can unpair the device if your receiver supports unpairing. To unpair the device, just click on the “Unpair” button and confirm in the window that pops up.

Viewing and changing device settings

When a device is selected you can see the approximate battery level of the device, if that is reported by the device, and the status of the link between the device and its receiver.

You can also see and change the settings of devices. Changing settings is performed by clicking on buttons, moving sliders, or selecting from alternatives.



Device setings now have a clickable icon that determines whether the setting can be changed and whether the setting is ignored.


If the selected device that is connected to a receiver is powered down or otherwise disconnected its settings cannot be changed but it still can be unpaired if its receiver allows unpairing.


Remapping key and button actions

For many devices Solaar can remap some of their keys or buttons to perform a different action. (This changes the information that the device sends when the key or button is activated.) Only some keys on some devices can be remapped and they can only be remapped to a limited number of actions. The remapping is done by selecting a key or button in the left-hand box on the “Action” setting line and then selecting the action to be performed in the right-hand box. The default action is always the shown first in the list. As with all settings, Solaar will remember past action settings and restore them on the device from then on.


The names of the keys, buttons, and actions are mostly taken from Logitech documentation and may not be completely obvious.

It is possible to end up with an unusable system, for example by having no way to do a mouse left click, so exercise caution when remapping keys or buttons that are needed to operate your system.

Solaar command line interface

Solaar also has a command line interface that can do most of what can be done using the main window. For more information on the command line interface, run solaar --help to see the commands and then solaar <command> --help to see the arguments to any of the commands.

Solaar settings

Solaar supports at least the following settings:

Setting Description
Hand Detection Turn on backlight when your hands hover over the keyboard
Scroll Wheel Smooth Scrolling Higher-speed vertical scrolling
Side Scrolling When off, side scrolling sends custom button events
Scroll Wheel High Resolution Higher-speed vertical scrolling
Scroll Wheel HID++ Scrolling When on, vertical scrolling uses HID++ events
Scroll Wheel Direction Reverse direction of vertical scrolling
Scroll Wheel Resolution Higher-speed vertical scrolling (use with caution)
Scroll Wheel Rachet Shift wheel ratchet on and off based on wheel speed
Thumb Wheel HID++ Scrolling When on, thumb-wheel scrolling uses HID++ events
Thumb Wheel Direction Reverse direction of thumb-wheel scrolling
Sensitivity (DPI) Mouse movement sensitivity
Sensitivity (Pointer Speed) Mouse movement sensitivity
Backlight Turn on backlight
Swap Fx function Change Fn keys to normally do their special action
DPI Sliding Adjustment Change Sensitivity (DPI) by holding a button and moving the mouse
Mouse Gestures Create HID++ events by holding a button and moving the mouse
Key/Button Actions Change what a key or button does
Key/Button Diversion Divert keys and buttons to create HID++ events
Divert crown events Divert crown actions to create HID++ events
Divert G Keys Divert G keys to create HID++ events
Disable keys Disable one or more keys
Set OS Change keys to match OS
Change Host Connect to a different host
Gestures Turn on and off various (mostly touchpad) gestures
Gesture params Modify parameters for gestures

HID++ events are mostly not processed by Linux input drivers. Settings that involve sending HID++ events exist so that these events can be processed by Solaar rules instead of by Linux.

Different Logitech devices may implement the same functionality in different ways, thus the different settings that do the same thing.