Stepper motor calibration and how to send commands

Brand new and i guess im missing the instruction to actually send your x carve a command while trying to calibrate the stepper motor. (ie i want to tell my machine to move 590mm across the x axis.

In Easel hit the carve button then the jog interface will open.

Machine—>Advanced–>Machine Inspector
In the console, type:
$J=G91 G21 X590 F8000