An exploratory sample is more useful when its label stays with it. Note the artwork version, the material description, and the date before making another adjustment, so later observations do not depend on memory alone.
Compare one change at a time
Keep the first sample beside the next one when possible. That makes a changed letterform, spacing choice, or visual balance easier to identify. A single sample is an observation, not a material guarantee or a final production claim.
Browse /updates/ for additional sample-planning notes.