How can I change a photo from a horizontal to a vertical photo?

Question

I have several pictures that I need to change from horizontal to vertical to a 4x6 size for a collage frame.

Answer 1

the only way that i know of doing that is too crop the sides of the horizontal photo.  then you will have a vertical one.

Answer 2

As was said below you will have to crop the photo. In your editing software set the aspect ratio at 4 w 6 h and then click and drag a crop box onto your picture, drag it to the desired crop then accept the crop in photoshop that is by clicking on the check mark