How to Size a Picture into Passport Size Photo in Photoshop
Easy way is pressing Alt+Ctrl+I and change what you want in image box. if you want to change canvas size pressing Alt+Ctrl+c ,you can select a part of picture with selection tools and then press Ctrl+c (Copy) then open a new window with pressing Ctrl +n and then paste selected area to this new window in this way after you open new window will ask you size and resolution .Then proceed