How can I trigger F1-F12 on my K880 keyboard?

Follow the instructions given below to trigger F1-F12 on your K880 keyboard:

1. Press and keep holding the Fn key.

2. Press the selected key on the F-row.

3. F1-F12 will work.

If you want to use the F1-F12 as the primary function you can lock the F-row on your keyboard to those functions only by pressing FN + Esc key.

To revert it back to the main icon functions you press again the FN+Esc key.