The host can also make changes to the G-code on the fly. This is handy if you want to make changes quickly, such as turn a fan on or off or adjust its speed. To do this, you simply enter the G-code command in a command-line window and click on Send.
The following screenshot shows the host program Repetier-Host:
Its command line is located under the Manual Control tab. The following screenshot shows the host Pronterface:
Its command line is located on the bottom-right corner of the program. A nice feature of Pronterface is its capability ...