Tree history

Edit a node. Unchanged branches stay shared between the two versions.

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Shared with previous New in current

Matching # numbers identify the same GC object. Editing copies only the path from the selected node to the root. Click a current node to edit, or use Tab and Enter or Space. Enter saves; Escape cancels.

Only the two displayed versions are retained. Each update discards the older previous version.

The browser decides when unreferenced nodes are collected.