Powerpoint

Hi Frances, thanks for the query. You can switch the grid and guides on by right clicking on any of the white space of a slide (not on any of the objects) and then selecting "Grid and Guides) from the menu. If you select the grid option, a network of fixed guides will be overlaid onto your slide, wherease the drawing guides option will allow you to position individual guides (remember to use the ALT key for fine adjustments) and thereby ensure consistency between slides.

Hope this helps,

Anthony