2. Use the undo and redo commands in Microsoft Office programs. There are three main ways to use the undo and redo commands in Microsoft Office programs on a PC: 1  Click Edit and then select Undo to undo and Repeat to redo. 2  You can find this option on the top left of the toolbar.
seg (plural segs) 1  A metal stud or plate fixed to the sole or heel of a shoe to prevent excessive wear. Also known as a blakey. ( 2 dialect) A callus, an area of hardened skin.
The Multifocal Electroretinogram. What is the Electroretinogram (ERG)? The electroretinogram (ERG) is a recording of the bioelectric potential, the summed activity of the retinal cells located at the back of the eye, when stimulated by light. When bioelectrical changes occur within the retina, the change is propagated to the surface of the cornea.