Final answer:
The best practice when configuring the first step in an identification section using pattern designer is to use a unique identifier for each step, as it provides clarity and maintains the integrity of the process.
Step-by-step explanation:
When configuring the first step in an identification section using pattern designer, C) Using a unique identifier for each step is considered a good practice. This approach ensures that each step in the process can be accurately identified and distinguished from others, which is essential for troubleshooting and maintaining the integrity of the identification process. Unlike options A and B, using unique identifiers does not compromise security or predictability. Option D, skipping the first step, could lead to confusion and a lack of structure in the identification process, which is not advisable.