Pending changes and committing

Every reorder queues a pending change rather than renaming on disk immediately. This lets you drag things around freely and check the result before anything is written — and when you do commit, all the renames happen in a single safe pass, so files swapping numbers can never collide partway through. Commit when the layout looks right; discard to abandon everything you've changed this session. You need to clear pending changes (commit or discard) before the app will re-scan the folder.

Commit — Writes all pending renames to disk at once. The button shows how many changes are waiting as a count in parentheses after its label; committing applies them and the count returns to zero.