Click on the Use view mode button to select the view mode, or press the Q key when the image is in focus.
Use this mode to browse through the series of frames/images using the mouse wheel. You can also hold down the left mouse button and move the mouse up/down to browse the images/frames without using the transitions.
Press CONTROL and scroll the mouse wheel to zoom in and out of the current image.
Press SHIFT and move the mouse to pan across the image if it's larger than the window.