The purple rectangle shows you the peak that Skyline originally chose, before the user adjusted the peak boundaries, or chose a different peak.
You can make that purple rectangle disappear by unchecking "Original Peak" on the chromatogram right-click menu.
Also, on the chromatogram right-click menu you can uncheck "Auto Scale Y-Axis" and then you will be able to control zooming in and out in the vertical direction by doing things such as dragging a rectangle on the graph, or using your mouse wheel to scroll out. If you combine that with "Synchronize Zooming" you might be able to get it so that all of your chromatogam graphs look the way you want them to.
-- Nick |