The Levels command adusts the intensity levels of the color values in a picture. For example, you can boost the brightness or dark values, adjust the gamma bias, or limit how dark or bright a photo can be by adjusting the triangles underneath the graph or b&w gradient. You can adjust the entire picture at once, or by individually adusting the Red, Green, and Blue colors that make up a picture.
Levels in Photoshop are color and brightness correction.
To adjust the brightness levels of the overal picture, or individual R,G,and B values by either boosting or limiting the light and dark values, or adjusting the bias of the gamma.
Photoshop Elements is Photoshop but with less features, so Photoshop is better but it is professional level software. For home use or to get started Photoshop Elements is OK.
Photoshop 3.0
No, photoshop is not the law
what is photoshop?
You can adjust color from Image - Ajustment - Levels, or Curves for color cast see related link below.
Well Photoshop Elements is basically Photoshop, but that everything is already ready there. it's like easy version of Photoshop.
You can't. You need brushes photoshop 7 brushes for photoshop 7.0
By using photoshop of course
No Photoshop CS5 and Photoshop Elements are separate programs.
Adobe PhotoShop is an image editing application. You can get it from:http://www.adobe.com/products/photoshop/photoshop/there it costs $700 USD.