After an RGB profile is selected for the document, you can preview the image with the default color profile applied. You can also soft-proof images, which means to preview on-screen what the image will look like when it is printed with a specific printer, or when it is displayed on another type of monitor. You can also soft-proof by using a specific rendering intent. For more information, see What is a rendering intent?. After soft-proofing an image, you can turn off the soft-proofing feature.
Soft proof documents to preview final results on-screen. (left) An sRGB color profile is assigned to an image. (right) Assigning the U.S. Web Coated (SWOP) v2 profile allows an on-screen simulation of the printed output.
Simulating printer output may cause on-screen colors to appear dull because all colors are brought into a CMYK color space, which has a smaller gamut than an RGB color space. After soft proofing an image, you can turn off the soft proofing feature.
The accuracy of the simulation depends on factors such as the quality of your monitor, the color profile of the monitor and the output device, and the ambient lighting in your work area.