Having purchased two recommended items by David Brooks - Dell U2410 monitor and Xrite i1 Display2 calibration - I am trying hard to understand how the developed profiles are implemented and/or used. Correct me if I am wrong - the calibration achieved develops a monitor profile that is automatically used when there is a display on the screen. Then if one wishes to print that which is on the screen the monitor calibration needs to have been set so the Luminance is 90.0 CD/m2. This ensures the photo one has negotiated through the photo editing software - in my case PSE9 - has a realistic opportunity of coming of a printer (online printer) as one saw on the monitor screen. So not only does the calibration need to reflect that which we have just stated, we also need to have a printer profile. In my case, the online service provides one and tells you where to install it. I don't understand how the printer profile will work. If it is placed in the spot directed does it automatically attach itself to the file to be printed or is there some mechanism one goes through to do this when uploading to the site? The luminance suggestion leaves one's computer screen in a dimmer light than is pleasing. Is there a way to alternate between settings so the file going to the printer is correct but one can switch back to a more pleasing luminance value? By the way, in reading the answers in David Brooks answers magazine Mar 2011 I am already down to a 40 brightness and 30 contrast and was only able to get my luminance to about 124. Anyway, either direct help or a location of information that would explain all this to me would be appreciated.