Instructions for Logitech keyboards are available on Logitech.com. To download or view these instructions, navigate to Logitech.com, put the mouse cursor over the Support option at the top of the page, and click Support + Downloads in the Support menu.
On the Logitech Support page, click Keyboards in the Find Your Product section to go to the support page for keyboards. Click a keyboard type to display all the available keyboard models in the selected keyboard type. Click the More button under a keyboard model to go to the product details page, where you can find the setup guide for the selected keyboard model.