Is it planned to implement document rotation functionality?
Use case - document is scanned upside down and should be rotated by 180 degrees.
I would say that is something you should rather do in a pre-processing step - i.e. before importing the document to enaio.
Alternatively you could implement a custom renditon-plus converter that rotates the image before converting it to pdf. But that would only correct the rotation of the preview pdf and not the original.
The current strategy of enaio redline is to only manage objects but not to edit them. Editing a content must be performed by use of external applications either on the client or by calling a job on the server.
The best way is as Nicolai suggested to assure the quality of content before filing them to enaio.