- Notes, cautions, and warnings
- Views of Latitude 5540
- Set up your Latitude 5540
- Specifications of Latitude 5540
- Dimensions and weight
- Processor
- Chipset
- Operating system
- Memory
- External ports
- Internal slots
- Ethernet
- Wireless module
- WWAN module
- Audio
- Storage
- Media-card reader
- Keyboard
- Keyboard function keys
- Camera
- Touchpad
- Power adapter
- Battery
- Display
- Fingerprint reader (optional)
- Sensor
- GPU—Integrated
- GPU—Discrete
- External display support
- Hardware security
- Smart-card reader
- Operating and storage environment
- Dell Support policy
- ComfortView Plus
- Using the privacy shutter
- Dell Optimizer
- Working inside your computer
- Removing and installing Customer Replaceable Units (CRUs)
- SIM card tray (Optional)
- Base cover
- Wireless card
- WWAN card (Optional)
- Memory modules
- Solid-state drive
- Removing the M.2 2230 solid-state drive from Slot 1
- Installing the M.2 2230 solid-state drive in Slot 1
- Removing the M.2 2280 solid-state drive from Slot 1
- Installing the M.2 2280 solid-state drive in Slot 1
- Removing the M.2 2230 solid-state drive from Slot 2
- Installing the M.2 2230 solid-state drive in Slot 2
- Fan
- Removing and installing Field Replaceable Units (FRUs)
- Battery
- Assembly inner frame
- Speakers
- Coin-cell battery
- Heat sink
- System board
- Power button
- Power button with optional fingerprint reader
- Keyboard
- Display assembly
- Display bezel
- Display panel
- Camera module
- Display hinges
- Display back cover
- Display cable
- Sensor board
- Fingerprint reader (Optional)
- Smart-card reader
- Dummy SIM-card slot filler
- Palm-rest assembly
- Software
- BIOS Setup
- Troubleshooting
- Handling swollen rechargeable Li-ion batteries
- Locate the Service Tag or Express Service Code of your Dell computer
- Dell SupportAssist Pre-boot System Performance Check diagnostics
- Built-in self-test (BIST)
- System-diagnostic lights
- Recovering the operating system
- Real-Time Clock (RTC Reset)
- Backup media and recovery options
- Wi-Fi power cycle
- Drain residual flea power (perform hard reset)
- Getting help and contacting Dell
Latitude 5540 Owner's Manual
Keyboard function keys
The F1-F12 keys at the top of the keyboard are function keys. By default, these keys are used to perform specific functions defined by the software application in use.
You can run the secondary tasks that are indicated by the symbols on the function keys by pressing the function key with fn, for example, fn and F1. See the table below for the list of secondary tasks and the key combinations to run them.
NOTE:Keyboard characters may differ depending on the keyboard language configuration. Keys that are used for tasks remain the same, regardless of the keyboard language.
NOTE:You can define the primary behavior of function keys in the
Function Key Behavior menu of the BIOS setup program.
| Key combination for task | What the task does |
|---|---|
| fn and F1 | Operating system and application specific F1 behavior |
| fn and F2 | Operating system and application specific F2 behavior |
| fn and F3 | Operating system and application specific F3 behavior |
| fn and F4 | Operating system and application specific F4 behavior |
| fn and F5 | Operating system and application specific F5 behavior |
| fn and F6 | Operating system and application specific F6 behavior |
| fn and F8 | Operating system and application specific F8 behavior |
| fn and F9 | Operating system and application specific F9 behavior |
| fn and F10 | Operating system and application specific F10 behavior |
| fn and F11 | Operating system and application specific F11 behavior |
| fn and F12 | Operating system and application specific F12 behavior |
| fn and Right Ctrl | Open application menu |
| fn and Cursor up | Page up |
| fn and Cursor down | Page down |
Keys with alternate characters
There are other keys on your keyboard with alternate characters. The symbols that are shown at the bottom of these keys are the main characters that are displayed when the key is pressed; the symbols that are shown at the top of these keys are displayed when the key is pressed with the shift key. For example, if you press 2, 2 is displayed; if you press Shift and 2, @ is displayed.
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