In PowerPoint 2007, you can also use drawing guides to position shapes and objects on slides. Tip To temporarily override the snap to options, hold down ALT while you drag the shape or object. The drawing grid includes an option, called snap to, that aligns objects to the nearest intersection of the grid or to another object as you draw or move objects. In Excel 2007, it is possible to print gridlines. Gridlines are not visible during a slide show and they do not print in a presentation or document. You can show or hide gridlines and you can change grid and guide settings by choosing from a range of preset measurements. In Excel 2007, the primary purpose of gridlines is to distinguish cell boundaries. Gridlines make it easier to align shapes and objects by giving you a visual cue in relation to the objects and the slide, document, or worksheet. And in Microsoft Office PowerPoint 2007, you can use drawing guides to position shapes and objects on slides. In Excel 2007, gridlines also make it easy to enter and find data in your worksheet. You can use gridlines to identify the center of your slide or document and position shapes and objects more precisely.