Fliiped image on viewport

 From:  sandykoufax (JEONGHO_KIM)
5830.1 
Hi,

I want to know this.
When I add viewport images on Back view,
default image view is flipped like below.

So I have to flip this

how can I fix it.
And how can I flip this image without resizing. :(

I'm using lastest v3 beta.

thanks,
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