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Backwards compatibility in OmniOutliner

Documents created in OmniOutliner 6 can be opened and edited by previous versions of OmniOutliner 5 for Mac and OmniOutliner 3 for iOS, however, the following data will be discarded by the previous versions:

Compact-list

  • Dynamic Theme style customization
  • Saved filters: Rule comments
  • Saved filters: Disabled rules
  • Saved filters: Some date-based rule configurations
  • Saved filters: Nested rule groups

If you are unsure whether an OmniOutliner 6 document contains style or filter data that will be lost if edited with a previous version of OmniOutliner, we recommend you duplicate the file before opening it in the earlier version.

Last Modified: Jan 6, 2026

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