Image Resolution, Pixel Dimensions and Document Size in Photoshop

1. Pixel Size

1.1. pixel size is always the same

1.2. Photoshop rezsizes pixels

2. Pixel Dimensions

2.1. Image menu is at the top of the screen

2.2. Image menu shows how large a photo is

2.3. Image Size dialog box

2.3.1. pixel dimensions

2.3.2. document size

2.4. width and height of a photo is in pixels

2.5. mega pixel means million pixels

3. Document Size

3.1. megabytes means millions of bytes

3.2. document size section only has one number for resolution

3.3. divide width and height of image by print resolution to print it

3.4. image resolution means nothing until a photo is printed