The Original Prusa MK4 and MK3.9 are equipped with a color LCD screen that, among other things, supports G-code thumbnails and QR codes.

The footer of the main screen can be edited to show the features you wish to be shown on the main page.

Make sure to always have the latest firmware.

Menu structure during printing

Tune
- - Change Filament
  - Cancel Object
    - - Cancel Current
  - Print Speed
  - Nozzle Temperature
  - Heatbed Temperature
  - Print Fan Speed
  - Flow Factor
  - Stuck Filament Detection
  - Stealth Mode
  - Sound Mode
  - Input Shaper
    - - Calibration
      - X-axis filter
      - X-axis frequency
      - Y-axis filter
      - Y-axis frequency
      - Restore defaults
  - Fan Check
  - Verify Gcode
  - Cutter (Only Available when MMU is installed)
  - User Interface
    - - Footer
        
        Item 1 [None/Nozzle/Bed/Filament/FSensor/Speed/X/Y/Z/Z Height/Print fan/Heatbreak fan/Heatbreak/Finda/Nozzle diameter/Nozzle PMW]
        
        Item 2
        
        Item 3
        
        Item 4
        
        Item 5
        
        Reset
      - Sort Files [Time/Name]
      - Print Progress Screen [OFF, 30 s - 200 s]
      - Menu Timeout
      - Sound Mode [Loud/Silent/Assist/Once]
      - For filament change, preheat [Nozzle/Noz&Bed]
      - RGB Status Bar
      - Touch
      - Touch Sig workaround
  - Network
    - - Active Interface [Eth/Wi-fi]
      - Network status
        
        Wi-fi status
        
        IPv4 Address
        
        IPv4 Gateway
        
        MAC Address
        
        Hostname
        
        DNS Server
        
        Connect Host
        
        Connect IP
        
        Ping | Loss
        
        Connect
        
        Gateway
        
        DNS server
      - Wi-Fi
        
        Wi-Fi status
        
        SSID
        
        Wi-Fi Wizard
        
        Protocol
        
        LAN
        
        IPv4 Address
        
        IPv4 Netmask
        
        IPv4 Gateway
        
        Hostname
        
        MAC Address
      - Ethernet
        
        Protocol
        
        LAN
        
        IPv4 Address
        
        IPv4 Netmask
        
        IPv4 Gateway
        
        Hostname
        
        MAC Address
      - Prusa Connect
        
        Enabled
        
        Status
        
        Error
        
        Hostname
        
        Add printer to Connect
        
        Load Settings
      - Prusa Link
        
        Enabled
        
        User
        
        Password
        
        IPv4 address
        
        Hostname
        
        Generate Password
      - Metrics & Log
        
        What is this?
        
        Allow
        
        Enable Stored on Startup
        
        Stored configuration
        
        Host
        
        Metrics port
        
        Log Port
        
        Current configuration
        
        Metrics Host
        
        Metrics Port
        
        Log Host
        
        Log Port
  - Time Zone Hour Offset
  - Time Zone Minute Offset
  - Time Zone Summertime
  - Info
  - Message History
Pause
Stop

Menu structure when idle

Print
Preheat
- - PLA
  - PETG
  - ASA
  - PC
  - PVB
  - ABS
  - HIPS
  - PP
  - FLEX
  - PA
  - Custom
    - - Name
      - Nozzle temperature
      - Nozzle Preheat Temperature
      - Bed Temperature
      - Is Abrasive
      - Requires Filtration
      - Confirm
  - Show All
  - Cooldown
Filament
- - Load filament
  - Unload filament
  - Change filament
  - Purge filament
  - Manage Filaments
    - - Loaded filament
        
        Name
        
        Visible
        
        Nozzle Temperature
        
        Nozzle Preheat Temperature
        
        Bed Temperature
        
        Is Abrasive
        
        Requires Filtration
      - Edit Filaments
      - Reorder Filaments
      - Enable Filaments
  - Preload to MMU (Only Available when MMU is installed)
    - - Preload All
      - Preload Filament 1
      - Preload Filament 2
      - Preload Filament 3
      - Preload Filament 4
      - Preload Filament 5
  - Preload to MMU Advanced (Only Available when MMU is installed)
    - - Filament 1 [PLA/PETG/ASA/PC/PVB/ABS/HIPS/PP/PA/FLEX]
      - Filament 2 [PLA/PETG/ASA/PC/PVB/ABS/HIPS/PP/PA/FLEX]
      - Filament 3 [PLA/PETG/ASA/PC/PVB/ABS/HIPS/PP/PA/FLEX]
      - Filament 4 [PLA/PETG/ASA/PC/PVB/ABS/HIPS/PP/PA/FLEX]
      - Filament 5 [PLA/PETG/ASA/PC/PVB/ABS/HIPS/PP/PA/FLEX]
      - Carry Out the Changes
  - Load to Nozzle (Only Available when MMU is installed)
    - - Load Filament 1
      - Load Filament 2
      - Load Filament 3
      - Load Filament 4
      - Load Filament 5
  - Unload Filament (Only Available when MMU is installed)
    - - PLA
      - PETG
      - ASA
      - PC
      - PVB
      - ABS
      - HIPS
      - PP
      - FLEX
      - PA
  - Eject From MMU (Only Available when MMU is installed)
    - - Eject From MMU 1
      - Eject From MMU 2
      - Eject From MMU 3
      - Eject From MMU 4
      - Eject From MMU 5
  - Cut Filament (Only Available when MMU is installed)
    - - Cut Filament 1
      - Cut Filament 2
      - Cut Filament 3
      - Cut Filament 4
      - Cut Filament 5
  - Manage Filaments (Only Available when MMU is installed)
Control
- - Move axis
    - - Move X
      - Move Y
      - Move Z
      - Move E
      - Cooldown
  - Temperature
    - - Heatbed temperature
      - Nozzle temperature
      - Print Fan speed
      - Cooldown
  - Auto home
  - Set ready
  - Disable Motors
  - Cold pull
  - Loading Test (Only Available when MMU is installed)
    - - Test Filament 1
      - Test Filament 2
      - Test Filament 3
      - Test Filament 4
      - Test Filament 5
  - Calibrations & tests
    - - 1. Fan test
      - 2. XY axis test
      - 3. Z alignment calibration
      - 4. Loadcell test
      - 5. Z axis test
      - 6. Heater test
      - 7. Gears Calibration
      - 8. Filament sensor calibration
Settings
- - Filament Sensor
  - Stuck filament detection
  - MMU unit
  - Cutter (Only Available when MMU is installed)
  - Stealth Mode
  - Fan check
  - Verify GCode
  - Input shaper
    - - Calibration
      - X-axis filter
      - X-axis frequency
      - Y-axis filter
      - Y-axis frequency
      - Restore defaults
  - User Interface
    - - Footer
        
        Item 1 [None/Nozzle/Bed/Filament/FSensor/Speed/X/Y/Z/Z Height/Print fan/Heatbreak fan/Heatbreak/Finda/Nozzle diameter/Nozzle PMW]
        
        Item 2 [None/Nozzle/Bed/Filament/FSensor/Speed/X/Y/Z/Z Height/Print fan/Heatbreak fan/Heatbreak/Finda/Nozzle diameter/Nozzle PMW]
        
        Item 3 [None/Nozzle/Bed/Filament/FSensor/Speed/X/Y/Z/Z Height/Print fan/Heatbreak fan/Heatbreak/Finda/Nozzle diameter/Nozzle PMW]
        
        Item 4 [None/Nozzle/Bed/Filament/FSensor/Speed/X/Y/Z/Z Height/Print fan/Heatbreak fan/Heatbreak/Finda/Nozzle diameter/Nozzle PMW]
        
        Item 5 [None/Nozzle/Bed/Filament/FSensor/Speed/X/Y/Z/Z Height/Print fan/Heatbreak fan/Heatbreak/Finda/Nozzle diameter/Nozzle PMW]
        
        Reset
      - Sort Files [Time/Name]
      - Print Progress Screen [OFF, 30 s - 200 s]
      - Menu Timeout
      - Sound Mode [Loud/Silent/Assist/Once]
      - For filament change, preheat [Nozzle/Noz&Bed]
      - RGB Status Bar
      - Touch
      - Touch Sig workaround
  - Language and Time
    - - Language
        
        English
        
        Čeština
        
        Deutsch
        
        Español
        
        Français
        
        Italiano
        
        Polski
        
        ニホンゴ
      - Time Zone Hour Offset
      - Time Zone Minute Offset
      - Time Zone Summertime
      - Time Format [24h/12h]
  - Network
    - - Active Interface [Eth/Wi-fi]
      - Network status
        
        Wi-fi status
        
        IPv4 Address
        
        IPv4 Gateway
        
        MAC Address
        
        Hostname
        
        DNS Server
        
        Connect Host
        
        Connect IP
        
        Ping | Loss
        
        Connect
        
        Gateway
        
        DNS server
      - Wi-Fi
        
        Wi-Fi status
        
        SSID
        
        Wi-Fi Wizard
        
        Protocol
        
        LAN
        
        IPv4 Address
        
        IPv4 Netmask
        
        IPv4 Gateway
        
        Hostname
        
        MAC Address
      - Ethernet
        
        Protocol
        
        LAN
        
        IPv4 Address
        
        IPv4 Netmask
        
        IPv4 Gateway
        
        Hostname
        
        MAC Address
      - Prusa Connect
        
        Enabled
        
        Status
        
        Error
        
        Hostname
        
        Add printer to Connect
        
        Load Settings
      - Prusa Link
        
        Enabled
        
        User
        
        Password
        
        IPv4 address
        
        Hostname
        
        Generate Password
      - Metrics & Log
        
        What is this?
        
        Allow
        
        Enable Stored on Startup
        
        Stored configuration
        
        Host
        
        Metrics port
        
        Log Port
        
        Current configuration
        
        Metrics Host
        
        Metrics Port
        
        Log Host
        
        Log Port
  - Hardware
    - - Printer Type [MK4/MK4S/MK3.9/MK3.9S]
      - Printhead
        
        Nozzle Diameter
        
        Nozzle Hardened
        
        Nozzle High-flow
        
        Nextruder Silicone Sock
        
        Nextruder
        
        Calibrate Filament sensor
      - G-code checks
        
        Nozzle Diameter [Warn/Strict/None]
        
        Printer Model [Warn/Strict/None]
        
        Firmware Version [Warn/Strict/None]
        
        Fan Compatibility [Warn/Strict/None]
        
        MK3 Compatibility [Warn/Strict/None]
        
        G-code Level [Warn/Strict/None]
      - Display Refresh Speed [High/Low
  - FW update
  - System
    - - Save Crash Dump
      - Save Logs to File
      - Device Hash in QR
      - Load Settings from File
      - Factory Reset
        
        Reset Settings & Calibrations
        
        Hard Reset (USB with FW needed)
        
        Shipping Preparation
Info
- - Network Status
    - - Wi-Fi Status
      - IPv4 Address
      - IPv4 Gateway
      - MAC Address
      - Hostname
      - DNS Server
      - Connect Host
      - Connect IP
      - Ping | Loss
        
        Connect
        
        Gateway
        
        DNS Server
  - Sensor Info
    - - Heatbreak Temp
      - Board Temperature
      - Bed Temperature
      - MCU temperature
      - Nozzle Temperature
      - Loadcell Value
      - Filament Sensor
      - FINDA (Only Available when MMU is installed)
      - Print Fan
      - Heatbreak Fan
      - Heater Voltage
      - Input Voltage
      - Heater Current
      - Input Current
      - MMU current
  - Version Info
    - - Firmware Version
      - Bootloader version
      - MMU Version (Only Available when MMU is installed)
      - Buddy Board
      - Serial Number
      - Love Board
      - xLCD
  - Print Statistics
    - - Fail Stats
        
        Power failures
      - Statistics
        
        X Axis
        
        Y Axis
        
        Z Axis
        
        Filament
        
        MMU filament loads
        
        Print Time

Printer description

xBuddy and LoveBoard electronics wiring (MK4/S, MK3.9/S)

LCD menu (MK4/S, MK3.9/S)