Fit pdf to screen when in landscape mode

Is there an easy way to fill the PDFView with the PDF when in landscape mode?
In horizontal mode everything is perfect and the page is completely visible.
In landscape mode it's the name and the whole pdf is visible, but i want it to fit the screen width. So is there an easy way to set a zoom factor or something like that? The page should also scroll or be on top then.

Thank you in advance for your support!

no easy way to do this.
horz mode only fit screen height.
vert mode only fit screen width.
do you means, switch these 2 view mode when rotate?

thank you for that quick reply.

In my case - in both modes vert an horiz a pdf page is completely visible.
I want this behaviour in vert. mode but in landscape i want the pdf to fit the screen width and zoom in.