VGA Monitor Mirroring

Greetings---I have a external monitor that pivots into portrait mode & via a VGA connection using a mirroring-enabled drawing app (Sketchbook Pro) to sketch....
The problem is although the iPad in portrait or 'tall' mode, i can't get this to reflect on the external monitor. The image remains fixed in horizontal or in landscape mode. Turning the iPad landscape-wise causes the image to become portrait as desired but alas i can't draw what I'm needing to draw at that angle...
Anyone know how to fix this---hopefully?
Thanks!

From the lack of replies, apparently not a unresolvable ish at the moment. Hopefully Apple with fix this aspect of things with a future update....
Anyhow i did come up with a work-around (working with the iPad is nothing but 'work-arounds' i've come to learn ), maybe a obvious one to most out there; Lock the iPad's screen into place.
Yeah it does do the trick but is hardly a solution since the tools, drop down windows, etc. of the app now need to be read at a side angle which definitely puts a crimp where functionality is concerned...

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