This invention describes a method for changing a picture orientation of a picture taken by an image sensor of an electronic device, e.g., for taking horizontal and vertical pictures, preferably having identical picture size and a picture aspect ratio, without changing an orientation of an electronic device containing said image sensor. The electronic device can be a camera, a portable communication device, a mobile electronic device or a mobile phone. When using a cross-shaped image sensor, both horizontal and vertical pictures can be taken without rotating the camera. The image sensor can have other shapes for accomplishing the same goal, e.g., square shape. A user interface needs just one button for choosing the orientation and the chosen orientation will be also seen on the display (viewfinder) of the electronic device. The viewfinder can have non-picture areas used for displaying image and photography information.