Size Display

I am brand new to Photoshop and I am coming into it with a few years of being used to Paint Shoppe Pro. So I know it is going to be a struggle for me.

I am going to have a lot of questions. For starters, when you open a file, how do you see the length and width of the image easily?

So far I see where I can click on the little arrow button at the bottom frame of the window that contains the image and I click on the menu item for "Show" and then select "Document Dimensions" but it displays in inches and not in pixels.

Go to Edit:Image Size and it will show you the resolution of your canvas.