How to disable screen sleep mode when used with a Raspberry Pi?

Step 1: Open a terminal and type the command:

sudo nano /etc/lightdm/lightdm.conf

Step 2: Find the xserver-command' under the [Seat:*] paragraph, uncomment it, and modify it as follows:

xserver-command=X -s 0 -dpms

Step 3: Restart the system

sudo reboot