How to change EV in M Mode in Nikon D50?

How to change EV in M Mode in Nikon D50?

Adjust the aperture, shutter speed, or ISO. Exposure compensation doesn't work in manual mode.

You don't - you change the shutter speed and aperture individually. Your manual explains it perfectly well.

EV compensation has NO effect in manual mode in any camera.

If you want to deliberately under or over expose the pic, just look at the light meter & place the exposure where you want by changing either the ISO, or the aperture or the shutter speed (or a combination of all 3).

Exposure value (EV) is calculated from shutter speed and aperture size on one side of the equation with ISO and available light on the other. You can control the first three on-camera in manual (M) mode while you can modify the last on (with flash) or off-cam (depending on your creativity). Flash effects however doesn't show up in the lightmeter so it would be up to you to factor that in mentally.

You can't control EV directly in most modern cameras. You need to change the shutter speed or aperture until the exposure meter reads what you want. It is better to use a spot meter (or spot metering in the camera) to find the portion of the photo you want exposed to zone 5 than rely on matrix metering if you need to do exposure compensation.

My old Rolleicord lets me set EV directly. If I have a sunny day and I want to properly expose the shadows, I simply set EV 12.In areas of open sunlight, I go to EV 15. Aperture and shutter speed are already set or I can shift them and retain the same EV and it gives you a far better idea of the contrast you are dealing with… All without a light meter!

It's a shame the camera companies got rid of those features to sell us more expensive cameras with light meters and automatic exposure that gets fooled by contrasty light.

I'm assuming you are trying to set exposure compensation? No need to do this in manual. You simply change the shutter speed/iso/aperture by what EV amount you wish.

If you understand the exposure triangle and reciprocity, it is easy:

http://www.althephoto.com/concepts/reciprocity.php

Watch the exposure meter on your camera to confirm the change in EV when you make the adjustments.

EV (Exposure Compensation) simply doesn't work in Manual Mode. Manual means just that - you must make any adjustments to your exposure Manually. I'm staunchly opposed to messing with all three variables of the Exposure Triangle - Aperture, Shutter Speed and ISO. Choose one and make it a constant - set it and then forget it. In most situations you can make ISO the constant. Trust me, its much, much easier to deal with two variables than three.

You must learn to use your camera's light meter if you want to be successful using Manual Mode.

Suppose you're shooting a landscape and have your ISO at 100. Wanting the maximum depth of field, you choose f16. Now look and see what shutter speed the camera's light meter says will give a correct exposure. Suppose it says 1/100 sec. You release the shutter and check your results. The picture is ok but you'd like to see how it would look 1 and 2 stops underexposed and 1 and 2 stops overexposed.

ISO 100

f16 @ 1/25 sec. 2 stops overexposed.
f16 @ 1/50 sec. 1 stop overexposed.
f16 @ 1/100 sec. Metered Exposure
f16 @ 1/200 sec. 1 stop underexposed.
f16 @ 1/400 sec. 2 stops underexposed.

Now lets suppose that you could care less about your depth of field and want to use the aperture to control your over and under exposure.

f8.0 @ 1/100 sec. 2 stops overexposed
f11 @ 1/100 sec. 1 stop overexposed.
f16 @ 1/100 sec. Metered Exposure
f22 @ 1/100 sec. 1 stop underexposed.
f32 @ 1/100 sec. 2 stops underexposed.

Learn the Exposure Triangle here:
http://digital-photography-school.com/learning-exposure-in-digital-photography

After almost 42 years this all comes pretty easy.