Fusion 360 post processor

[f750]

Hi thank for the reply, I have been to change the file in Fusion 360 preferences something called External editor.

[m_c]

Hi thank for the reply, I have been to change the file in Fusion 360 preferences something called External editor.

Post processor editing is done an external editor.
If you're on windows, I would strongly recommend downloading and installing Notepad++, as it won't screw up text formatting like the default Windows Notepad generally does.