P20 - Two exposure 7991 x 4080 pixels

I was just reading the spec of this back and it mentions 'Two exposure' giving an image size of 7991 x 4080 pixels.
Is that only related to when it is mounted on view cameras or is there something else to this?
I do not really see this mentioned anywhere else in practice.
Is that only related to when it is mounted on view cameras or is there something else to this?
I do not really see this mentioned anywhere else in practice.