Hello dorico team, thank you very much for the impressive update!
I am enjoying it!
Is it possible to export all flows into one xml file?
And how should I do that?
( I managed to export all the flows separately.)
No, it is not currently possible to export all flows into a single MusicXML file. It is theoretically possible to encode multiple movements or pieces into a single compressed MusicXML file, but in practice no software (to my knowledge) supports this feature of MusicXML 3.0, so even if you could export all of the flows into a single MusicXML file, only the first flow would end up being loaded by another application in any case.