- 72ppi - general convention uploading images which are viewable on the screen e.g. website
- 300ppi - convention can be used for printing
White Balance
White balance is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo. Proper camera white balance has to take into account the "color temperature" of a light source, which refers to the relative warmth or coolness of white light.
levels, middle sampler, click on part of image.
Dodge
making the image lighter
Burn
maker the image darker
Vignette
making a focal point with the surroundings dark
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