First-pass resize: test the hardest source image

Before resizing a batch, choose a source with the most fragile content—small text, transparency, portrait framing, or thin graphics. Resize it to the intended dimensions and inspect the exported file at actual display size. Check aspect ratio, pixel dimensions, and whether crop or padding is required. If the result fails, adjust the rule before processing everything. Keep each original untouched; one good sample establishes the workflow but does not validate every image.