Received a 3-D Printer on 12/31/2020:

Creality Ender 3 V2 Upgraded 3D Printer with Silent Motherboard Meanwell Power Supply Carborundum Glass Platform and Resume Printing 220x220x250mm

From Amazon

Leanne and I put it together, and it successfully printed the “dog” test print. We had to adjust the Z-Axis switch up and down so that the bed would be in an adjustable range to level with the corner adjustment wheels. We printed the test print, although it still isn't completely level at the front left corner.

The language that is sent to 3-D printers is GCODE. These are a list of G-commands in a text file.

They are generated by “Slicer” programs such as Cura and Simplify3D. These generate G-code “automagically” from CAD models, so most users never see or program a single line of code.

• https://all3dp.com/g-code-tutorial-3d-printer-gcode-commands/