Question

when comparing two handwriting samples, what should be the first step?
look for the differences
look for the similarities
make sure the the ink matches
identify the author of the questioned document(s)

Explanation:

In handwriting comparison (often in forensic or document analysis contexts), the first step is typically to look for similarities as a foundational approach to analyze matching traits before focusing on differences or other aspects. Looking for differences or checking ink match/identifying author are subsequent or less - primary steps.

Answer:

Look for the similarities