1. After mastering the operation technology of the digital programming instrument, the first step is to install a negative and compare it with a drilling test board to measure its length and width deformation. On the digital programming instrument, the hole position is lengthened or shortened according to the size of the deformation, and the drilling test board after lengthening or shortening the hole position is used to match the deformed negative, avoiding the tedious work of cutting the negative and ensuring the integrity and accuracy of the graphics. This method is called "changing the hole position method".

2. In response to the physical phenomenon that the negative film changes with the temperature and humidity of the environment, the negative film in the sealed bag is taken out before copying and hung for 4-8 hours under working environment conditions to deform the negative film before copying, which will cause minimal deformation of the copied negative film. This method is called the "hanging method".

3. For graphics with simple lines, large line widths and spacing, and irregular deformation, the method of "splicing" can be used to cut the deformed part of the negative film and reassemble the hole positions of the drilling test board before copying, which is called "splicing method".

4. The method of using the holes on the test board to enlarge the circuit board and remove the heavy deformation of the solder pad to ensure the minimum ring width technical requirements is called the "solder pad overlap method".

5. The method of enlarging the shapes on the deformed film proportionally and remapping them for plate making is called the "mapping method".

6. The use of a camera to magnify or reduce deformed graphics is called the "photography method".