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.