The fn lock switch

The fn lock is an electronic switch that affects how you use hotkey functions. To turn it on and off, press fn + esc.

Note: The esc key is in the upper left corner of the keyboard. It has an LED that indicates the status of the fn lock switch.

Figure 1. Locations of the fn lock key and the fn key
an illustration of a Lenovo keyboard, with the fn lock key in the top left corner and the fn key in the lower left corner highlighted

an illustration of a Lenovo keyboard, with the fn lock key in the top left corner and the fn key in the lower left corner highlighted

A Lenovo keyboard usually contains hotkeys in the top row. These hotkeys share keys with the function keys (F1–F12) and other keys. For these dual-function keys, the icons or characters denoting the primary functions are printed on top of the icons and characters denoting the secondary functions.

Figure 2. The layout of a dual-function key.

A: an icon or character denoting the primary function
B: an icon or character denoting the secondary function

Table 1. fn lock and dual-function keys
fn lock (esc) LED	fn lock status	Pressing the hotkey alone	Pressing the hotkey while holding down the fn key
Off	Disabled	Primary function	Secondary function
On	Enabled	Secondary function	Primary function