Many times when you are viewing schematics, system diagrams or layouts (schematics, EM or artwork cells), you want the visible grid to be turned off. You can select and copy schematic or system diagram items or layout shapes and paste. In this case, there is no grid included. Sometimes you need a screen shot of your window. The grid can be turned off by using the View > Snapping Grid menu which applies to the active window only.
Layout with Grid On