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when are DRD markers refreshed?

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In Virtuoso-L, DRD is a nice feature at times but because of a lot of excessive and oversimplified spacing rules hardcoded into our released tech file (which we as end-users cannot / should not change), a lot of the markers are just irrelevant clutter which mask the useful ones.  To address this, I load a drdFixes.il file, which makes transient session-only changes to the rules (using calls to techSetSpacingRule and such) via the layout trigger so it gets loaded on every open, descend-edit, and return.

So, my question is, when do the markers get refreshed / regenerated?  Can the regen / refresh be performed manually from a skill command? Understanding this would help a lot with development of the drdFixes.il file.

Thanks


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