I left measure tool behind some time ago in favor of color port. Mostly because Scott Martin provided charts and reference files for it.http://www.on-sight.com/using-i1profiler-for-qtr-grayscale-measurement-and-profiling/http://www.on-sight.com/using-colorport-for-qtr-grayscale-and-alt-process-measurement-and-profiling/good stuff.The problem with both measure tool and color port is that both are old products unrelated to current xrite products, so updates and support for continual OS evolution gets problematic.Tyler