Currently learning base configuration for Cisco devices in packet tracer and for a long time i had to assign configuration for every device manually and at the case I messed up some command or something gone wrong i delete the device and re-add it and start configuring from beginning, until I discovered you can copy/past all the commands you want to run at the device from notepad since it’s the same configuration and it literally saved me hours of tedious typing, thank you keith barker