How can I verify that the config.txt file was read properly


I am trying to configure my controller board but I am unsure if it is working as I think.
I am using a hypercube (arm solution corexy).
This means when I want to move the Y-axis for example both motors (X any Y) must be running.
But there is only one at a time working.

Is there a way to find out if this configuration is OK. I know the 500 G code to check the stepper config but I need to know if the controller is working in the right mode.
When the firmware is updated successfully the file changes to .cur extension. It would be nice if the same happens in case of a successful configuration.

Best regards

You need to choose some config option that has an obvious effect ( like steps per millimeter ), change that, see if you notice the effect or not.