They give you a nice printed manual in the box that is very basic and does not explain much. But on the CD that came with the camera, there is an "Advanced" manual as a PDF. Copy it to your hard drive or even print it out. Look in the Table of Contents for the page for "Program Shift." Put the camera in "P" mode on the dial, then half-press the shutter button to get the exposure value. It will display them on the lower left. Press the thumb wheel and rotate it to change aperture and speed TOGETHER for the same Exposure Value. A second press on the thumb wheel switches you to change the exposure value (compensation). Another press switches back to EV. (The active function lights up orange.) You can change ONLY the aperture or the shutter speed in the "A" or "S" modes, but that changes exposure value (and ruins the shot). I only got my GX1 a month ago, my very first digital camera. I've been shooting film since 1951, with a Contax RTS for the last 37 years; I miss it. I DON'T miss the cost of film or the hours in a darkroom. It took a long time to learn to use film, so I'm giving digital all the time it needs for me to climb Mt. Learning Curve.