How the duplicate finder sensitivity presets (Strict, Balanced, Aggressive) change how aggressively visual duplicates are grouped, and which one fits your batch.
A practical guide to tune duplicate finder weights: adjust per-signal importance, re-apply without rescanning, and fix matches that are too loose or too tight.
How the 404 checker validates image URLs with lightweight HEAD requests, sorts reachable from unreachable, and lets you export a clean list to re-import.
How preview filters edit tasks: filter, search, and bulk-select images in the preview, then commit those changes directly to the saved task and its counters.
A full reference of the image downloader keyboard shortcuts for saving drafts, downloading, creating tasks, moving between tasks, and toggling modes hands-free.