By default Windows 10 lock the screen and switches off monitor after one minute. If you like longer time as per your convenient than you need to do simple setting in power options, there may be various ways to adjust screen time out, but here I am going to shows very easy steps.
1. Type and open “Power Option” from start
2. Click on “Change plan settings” in balance (recommended), In turn off the display set your desire time for lock screen time out, if you want to set specific time than click on “Change advanced power settings”
3. Scroll down extend the “Display” – “Turn off display after” set your desire time than “Apply-ok” “save changes”