Copper shorts can be identified with testing. Make sure you define test requirements in your PCB design software.
Forget about using antiquated design software with a command line interface. Altium Designer gives you access to the best features
For the best success when manufacturing your PCB design, you need the latest Gerber X2 file formats in the free Gerber file editor in your PCB design tools.
To successfully build your printed circuit board, your manufacturers need complete and accurate assembly instructions from you in your PCB assembly drawings.
Make sure your high voltage PCB design is safe and manufacturable with the complete set of design tools in Altium Designer.