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Using diagram history feature, users can quickly review and restore diagram changes. If diagram uses new SVG format (cloud plugin as of late 2022) users will be able to easily restore that version.
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By clicking the history button, user will be presented with the following popup:
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After you create new version for this file it will be shown in History Explorer but old versions will be omitted.
On-prem
Server/DC versions also have History Explorer but are only able to show preview of the previous versions.