When you start a simulation, the CNC editor enters runtime mode.
During runtime (simulation is running) the background color of the editor changes to indicate that it is in runtime mode.
In runtime mode, you cannot make changes to the program. The editor is read-only.
A gray line indicates the current block being simulated.
If the CNCSimulator Pro interpreter encounters an error during simulation, you will see an alarm message and the editor will go back to normal mode, allowing edits.
The block containing the error will be underlined with a red wavy line so you can easily find it and correct the error.
If you stop the execution (simulation) of a CNC program before it is done, a yellow square symbol indicates the last executed block.
