If selected , the drawing has the latest versions of all xrefs loaded.
If cleared , there are newer versions of xrefs in the vault. Select this option to get the latest version of all checked in xrefs and update the drawing to reflect the changes.
A gray checkmark indicates the add-in does not know if the xref is up-to-date. This can happen when the drawing just opened and the add-in has not yet checked the vault for newer versions.
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