Lenovo ThinkPad X270 User Manual page 90

Description: If you select Enabled, you can press the Fn key (instead of press and hold) to keep it
in a pressed condition. Then press the function key you want. The action is equivalent to pressing
the function key simultaneously with the Fn key.
• F1–F12 as primary function
Values: Disabled, Enabled
Description: If you select Enabled, pressing the function keys directly inputs F1–F12. If you select
Disabled, pressing the function keys directly initiates the special function printed as an icon on each
key. To temporarily switch the above two functions, press Fn+Esc.
Display
• Boot Display Device
Values: ThinkPad LCD, HDMI, Display on dock
Description: Select the display device that you want to activate at boot time. This selection is effective for
boot time, password prompt, and ThinkPad Setup. Display on dock corresponds to the video connectors
(such as the DisplayPort, DVI, or VGA connectors) on a docking station.
• Shared Display Priority
Values: HDMI, Display on dock
Description: Select the priority between shared display outputs. HDMI and Dock displays share a single
display output. This option chooses which one is prioritized.
• Total Graphics Memory
Values: 256 MB, 512 MB
Description: Allocate the total memory which Intel internal graphics shares.
Note: If you select 512 MB, the maximum usable memory might be reduced on the 32–bit operating
system.
• Boot Time Extension
Values: Disabled, 1 second, 2 seconds, 3 seconds, 5 seconds, 10 seconds,
Description: During the boot process, the computer might not detect the external monitors that need
more time to get ready. Select how long you want to extend the boot process.
Power
®
• Intel SpeedStep technology
Values: Disabled, Enabled
Description: Select the mode of Intel SpeedStep technology at runtime.
• Adaptive Thermal Management
Values: Maximize Performance, Balanced
Description: Select a thermal management scheme to use. The scheme affects fan sound, temperature,
and performance.
• CPU Power Management
Values: Disabled, Enabled
Description: Enable or disable the power-saving feature that stops the microprocessor clock automatically
when there are no system activities. Normally, it is not necessary to change the setting.
• Power On with AC Attach
Values: Disabled, Enabled
Description: Enable or disable a feature that turns on the computer when the ac power adapter is attached.
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X270 User Guide