So there’s zero need to directly connect the pc to the printer. Usually there’s either a microsd or similar to plug in and load to print from that.

However, if you want to, Pronterface is a useful tool for providing command inputs via usb.

It gives you a basic gui to set temperature, manually move the print bead, some telemetry (real time temp charts,) and if you really felt like it… you can print small files across the usb (or push them to the sd and tell it to print from there. Though file transfer rate is usually dog-breath slow.)

Most usefully, it has a command line interface that allows you to send manual gcodes. This is very helpful for tuning and maintenance. (For example m851 will report XYZ offset, and you can set it with for example m851 z-2.47)

Or if you use UBL, create and store the g29 meshes (and if you add t to the command it’ll report values. For example g29 l0 t will load the mesh in slot 0, and report in the box.)

There’s a ton of useful g and m codes.