How do I change my monitor orientation from vertical to landscape on a HP Probook 4430?

[jmcrume]

My son in law was using his laptop when it suddenly switched from landscape to vertical monitor orientation.  He doesn't know what he did or how to change it back.

[banhien]

Hi,

Please try this first

Hold down BOTH Ctrl and Alt keys, then hit an arrow (right or left)

Regards.

[JohnSandfordNZ]

This was helpful but I needed to use the up/down arrows to achieve the desired outcome. Thank you

[AG3486]

I also had this issue recently, was cleaning the keyboard of my HP and the screen flipped horizontal. I had to hold down the Ctrl key + Alt key as stated but I think its important to note the Up Arrow Key is the one that should be pressed in conjunction with those.

[flightrisk]

These keys do nothin and didnt the last time this happened 3 years ago. I have a probook 4545 and the latest windows 10 updaye which is what screwed this up