Logitech K780 Instruction Manual

Frequently Asked Questions
+Cleaning Logitech keyboards and mice
Before you clean your device:
Unplug it from your computer and make sure it’s turned off.
Remove the batteries.
Keep liquids away from your device, and don’t use solvents or abrasives.
To clean your Touchpad, and other touch-sensitive and gesture-capable devices:
Use lens cleaner to lightly moisten a soft, lint-free cloth and gently wipe down your
device.
To clean your keyboard:
Use compressed air to remove any loose debris and dust between the keys. To clean the
keys, use water to lightly moisten a soft, lint-free cloth and gently wipe down the keys.
To clean your mouse:
Use water to lightly moisten a soft, lint-free cloth and gently wipe down the mouse.
NOTE: In most cases, you can use isopropyl alcohol (rubbing alcohol) and anti-bacterial wipes.
Before using rubbing alcohol or wipes, we suggest you test it first in an inconspicuous area to
make sure it doesn’t cause discoloration or remove the lettering from the keys.
+Comfort Guidelines - Important Ergonomic Information
Whether you spend five minutes or five hours using your keyboard, mouse or trackball, these
suggestions can help you stay comfortable and productive. Some research suggests that
long periods of repetitive motion,
using an improperly set up work space,
incorrect body position, and
poor work habits
may be associated with physical discomfort and injury to nerves, tendons, and muscles. If you
feel pain, numbness, tingling, weakness, swelling, burning, cramping, or stiffness in your hands,
wrists, arms, shoulder, neck, or back, see a qualified health professional.
Follow the guidelines in the guidelines PDF file below to maximize your comfort and lessen the
chance of injury.

Download the Comfort_Guidelines.PDF
The guidelines are written in the following languages: English, Deutsch, Francais, Italiano,
Espanol, Portugues, Nederlands, Svenska, Dansk, Norsk, Suomi, Greek, Russian, Hungarian,
Czech and Polish.
You will need Adobe® Acrobat® Reader™ to read PDF files.
+Backup device settings to the cloud in Logitech Options
INTRODUCTION
HOW IT WORKS
WHAT SETTINGS GET BACKED UP
CURRENT LIMITATIONS
INTRODUCTION
This feature on Logi Options allows you to backup the settings of your Options supported device
automatically to the cloud after creating an account. If you are planning to use your device on a
new computer or wish to go back to your old settings on the same computer, log into your
Options account on that computer and fetch the settings you want from a backup to setup your
device and get going.
HOW IT WORKS
When you are logged into Logitech Options with a verified account, your device settings are
automatically backed up to our cloud by default. You can manage the settings and the backups
from the Backups tab under More settings of your device (as shown in the screenshots below):

Manage settings and backups by clicking on More>Backups.

AUTOMATIC BACKUP OF SETTINGS - If the ‘Automatically create backups of
settings for all devices’ checkbox is enabled, any settings you have or modify for all of
your devices on that computer are backed up to the cloud automatically. The checkbox is
enabled by default. You can disable it if you don’t want the settings for your devices to
be backed up automatically.
‘CREATE A BACKUP NOW’ button - This button allows you to backup your current
device settings yourself, if you need to fetch them later.
‘RESTORE SETTINGS FROM BACKUP’ button - This button lets you view and
restore all the available backups you have for that device that are compatible with that
computer, as shown above.
The settings for a device are backed up for every computer that you have your device connected
to and have Logitech Options that you are logged into. Every time you make some modifications
to your device settings, they get backed up with that computer name. The backups can be
differentiated based on the following:
1. Name of the computer. (Eg. John’s Work Laptop)
2. Make and/or model of the computer. (Eg. Dell Inc., Macbook Pro (13-inch) etc.)
3. The time when the backup was made.
The desired settings can then be selected and restored accordingly.

WHAT SETTINGS GET BACKED UP
Configuration of all the buttons of your mouse
Configuration of all the keys of your keyboard
Point & Scroll settings of your mouse
Any application-specific settings of your device
WHAT SETTINGS ARE NOT BACKED UP
Flow settings
Options app settings
CURRENT LIMITATIONS

1. The device settings aren’t compatible between Windows and Mac operating systems. So,
the settings from Windows operating system cannot be applied to a computer with the
Mac operating system and vice versa.
2. There are some features that are available only on certain versions of Windows operating
system. For example, triggering Cortana through a mouse button press is a feature
available only on Windows 10 and not on Windows 7 and 8 as Cortana is not available
on those operating systems. In such cases, those features cannot be applied on the
unsupported operating systems.
+Logitech Options permission prompts on macOS Catalina and macOS Mojave
Logitech Options permission prompts on macOS Catalina
Logitech Options permission prompts on macOS Mojave
Download the latest version of Logitech Options software.
Logitech Options permission prompts on macOS Catalina
For official macOS Catalina support, please upgrade to the latest version of Logitech Options
(8.02 or later).
Starting with macOS Catalina (10.15), Apple has a new policy that requires user permission for
our Options software for the following features:
Accessibility access is needed for scrolling, gesture button, back/forward, zoom and
several other features
Input monitoring (new) access is needed for all the features enabled by the software
such as scrolling, gesture button and back/forward among others for devices connected
via Bluetooth
Screen recording (new) access is needed to capture screenshots using a keyboard or a
mouse
System Events access is needed for Notifications feature and Keystroke assignments
under different applications
Finder access is needed for the Search feature
System Preferences access if needed for launching Logitech Control Center (LCC) from
Options
Accessibility Access
Accessibility access is needed for most of our basic features like scrolling, gesture button

functionality, volume, zoom, and so on. The first time you use any feature that requires
accessibility permission, you'll be presented with the following prompt:
To provide access:
1. Click Open System Preferences.
2. In System Preferences, click the lock at the bottom left corner to unlock.
3. In the right panel, check the boxes for Logitech Options and Logitech Options
Daemon.
If you already clicked ‘Deny’, do the following to allow access manually:
1. Launch System Preferences.
2. Click Security & Privacy, then click the Privacy tab.
3. In the left panel, click Accessibility and then follow steps 2-3 above.
Input Monitoring Access
Input monitoring access is needed when devices are connected using Bluetooth for all features
enabled by the software such as scrolling, gesture button and back/forward to work. The
following prompts will be displayed when access is needed:

1. Click Open System Preferences.
2. In System Preferences, click the lock at the bottom left corner to unlock.
3. In the right panel, check the boxes for Logitech Options and Logitech Options
Daemon.
4. After you check the boxes, select Quit Now to restart the application and allow the
changes to take effect.

If you already clicked ‘Deny’, please do the following to allow access manually:
1. Launch System Preferences.
2. Click Security & Privacy, and then click the Privacy tab.
3. In the left panel, click Input Monitoring and then follow steps 2-4 from above.
Screen Recording Access
Screen recording access is needed to capture screenshots using any supported device. You'll be
presented with the prompt below when you first use the screen capture feature.
1. Click Open System Preferences.
2. In System Preferences, click the lock at the bottom left corner to unlock.
3. In the right panel, check the box for Logitech Options Daemon.

4. Once you check the box, select Quit Now to restart the application and allow the changes
to take effect.
If you already clicked ‘Deny’, use the following steps to allow access manually:
1. Launch System Preferences.
2. Click Security & Privacy, then click the Privacy tab.
3. In the left panel, click on Screen Recording and follow steps 2-4 from above.
System Events prompts
If a feature requires access to a specific item like System Events or Finder, you will see a prompt
the first time you use this feature. Please note that this prompt appears only once to request
access for a specific item. If you deny access, all the other features that need access to the same
item will not work and another prompt will not be shown.

Please click on OK to allow access for Logitech Options Daemon so that you can continue to use
these features.
If you already clicked on Don’t Allow, use the following steps to allow access manually:
1. Launch System Preferences.
2. Click Security & Privacy.
3. Click the Privacy tab.
4. In the left panel, click Automation and then check the boxes under Logitech Options
Daemon to provide access. If you are unable to interact with the checkboxes, please click
the lock icon on the bottom left corner and then check the boxes.
NOTE: If a feature still doesn’t work after you grant access, please reboot the system.
Click here for information on macOS Catalina and macOS Mojave permissions on
Logitech Control Center.
Click here for information on macOS Catalina and macOS Mojave permissions on
Logitech Presentation software.

Logitech Options permission prompts on macOS Mojave
For official macOS Mojave support, please upgrade to the latest version of Logitech Options
(6.94 or later).
Starting with macOS Mojave (10.14), Apple has a new policy that requires user permission for
our Options software for the following features:
Accessibility access is needed for scrolling, gesture button, back/forward, zoom and
several other features
Notifications feature and keystroke assignments under different applications need access
to System Events
Search feature needs access to Finder
Launching Logitech Control Center (LCC) from Options requires access to System
Preferences
The following are the user permissions the software needs for you to get complete functionality
for your Options-supported mouse and/or keyboard.
Accessibility Access
Accessibility access is needed for most of our basic features like scrolling, gesture button
functionality, volume, zoom, and so on. The first time you use any feature that requires
accessibility permission, you'll see a prompt as shown below.
Click Open System Preferences and then turn on the checkbox for Logitech Options Daemon.
In case you clicked Deny, use the following steps to allow access manually:
1. Launch System Preferences.
2. Click on Security & Privacy.
3. Click the Privacy tab.

4. In the left panel, click on Accessibility and check the boxes under Logitech Options
Daemon to provide access (as shown below). If you are unable to interact with the
checkboxes, please click the lock icon on the bottom left corner and then check the
boxes.
System Events prompts
If a feature requires access to any specific item such as System Events or Finder, you will see a
prompt (similar to the screenshot below) the first time you use this feature. Please note that this
prompt appears only once, requesting access for a specific item. If you deny access, all the other
features that need access to the same item will not work and another prompt will not be shown.

Click OK to allow access for Logitech Options Daemon so that you can continue to use these
features.
In case you clicked Don’t Allow, use the following steps to allow access manually:
1. Launch System Preferences.
2. Click Security & Privacy.
3. Click the Privacy tab.
4. In the left panel, click Automation and then check the boxes under Logitech Options
Daemon to provide access (as shown below). If you are unable to interact with the
checkboxes, please click the lock icon on the bottom left corner and then check the
boxes.

NOTE: If a feature still doesn’t work after you grant access, please reboot the system.
+Craft, K375s, MK850 and K780 special key combinations
Our Craft, K375s, MK850, and K780 keyboards have a special key combination that let you
swap the layouts for language and operating systems.
For each combination, you’ll need to hold the keys down until the LED on the Easy-Switch
mode key 1 is lit (press and hold the key combination for three seconds).
Easy-Switch key 1
Craft
K375s
MK850
K780

FN+U—swaps ‘#’ and ’A’ with the ‘>’ and ’<’ keys
NOTE: This only affects European 102 and US International layouts. FN+U only works
on Mac layouts, so make sure you have switched to Mac layout by pressing FN+O.
FN+O—swaps PC layout to Mac layout
FN+P—swaps Mac layout to PC layout.
FN+B—Pause Break
FN+ESC —swaps between the smart keys and F1-12 keys.
NOTE: This syncs with the same checkbox feature in the Options software.
+Logitech Bluetooth keyboard unable to pair with Android 7.x device
Some users have reported that their Logitech keyboard will not pair with their Android 7.x
device after they've entered the pairing code.
Users get a "connection timed out" error or no error message at all.
Clearing the Bluetooth cache, power cycling the device, attempting to pair again, or pair
to another Android 7.x device does not work.
If you are experiencing this issue, please try the following:
1. Boot your Andriod 7.x device into Safe Mode. This typically involves holding down the
power button and volume key at the same time, but you should confirm the exact steps on
your device manufacturer's website.
NOTE: You'll see an on-screen notification when the device is in Safe Mode.
2. While in Safe Mode, pair the keyboard with your device.
3. After the keyboard has successfully paired, restart your device normally. The keyboard
should continue to be paired with your device.
+Bluetooth troubleshooting for Logitech Bluetooth Mice, Keyboards and Presentation
remotes
Bluetooth troubleshooting for Logitech Bluetooth Mice, Keyboards and Presentation
remotes
Try these steps to fix issues with your Logitech Bluetooth device:
My Logitech device doesn’t connect with my computer, tablet or phone
My Logitech device has already been connected, but frequently gets disconnected or
laggy
Other useful FAQs that may help to fix the issue:
Check for Bluetooth Low Energy Support

Lag and disconnections on Bluetooth devices can be due to WiFi interference
Resolve Bluetooth Wireless issues on Mac OS X
Resolve Bluetooth Wireless issues on Windows 10
+Install and use the SecureDFU firmware update
Some K780, K375s, and K850 keyboards may experience the following:
When your keyboard is in sleep mode, it takes more than one keypress to wake it
The keyboard enters sleep mode too quickly
If you are experiencing this problem, please download the Logitech Firmware Updating Tool
(SecureDFU) from your product's Download page and follow the onscreen instructions.
NOTE: You’ll need a Unifying receiver to perform the update.
Install and use the SecureDFU tool
1. Download and open SecureDFU_x.x.xx and select Run. The following window appears:
NOTE: During the firmware update process, Unifying devices will be unresponsive.
2. Click CONTINUE until you reach the window shown:

3. Click UPDATE to update your device. It’s important to not disconnect your keyboard
during the update, which may take several minutes.
4. Once the update is finished, the DFU tool will prompt you to update your Unifying
receiver.

5. Click UPDATE.
6. Once the update has finished, click CLOSE. Your device is ready to use.
+System Extension Blocked message when installing Logitech Options or LCC

Starting with macOS High Sierra (10.13), Apple has a new policy that requires user approval for
all KEXT (driver) loading. You may see a "System Extension Blocked" prompt (shown below)
during the installation of Logitech Options or Logitech Control Center (LCC).
If you see this message, you'll need to approve the loading of the KEXT manually so that your
device drivers can be loaded and you can continue to use its functionality with our software. To
allow KEXT loading, please open System Preferences and navigate to the Security & Privacy
section. On the General tab, you should see a message and an Allow button, as shown below. In
order to load the drivers, click Allow. You may need to reboot your system so the drivers are
properly loaded and the functionality of your mouse is restored.
NOTE: As set by the system, the Allow button is only available for 30 minutes. If it has been
longer than that since you installed LCC or Logitech Options, please restart your system to see
the Allow button under the Security & Privacy section of System Preferences.