Hi,
In paperspace I can scale and rotate etc. a viewport but I can't mirrow it for to me unknown reasons.
After reading and testing this user request I agree that it would make sence to have such an option. The solution from Andrew to accomplish that task with blocks / edit block in place is already a nice solution but to me it feels like paperspace would be the correct place with less action to manage. The user can still design the drawing as usal in modelspace without thinking about the "special treatment" for the block which is used for the mirrowed presentation.

Refering to forum conversation:
https://qcad.org/rsforum/viewtopic.php?f=32&t=10611&p=43614#p43614