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.
What is electroretinography (ERG)? Electroretinography (ERG) is an eye test used to detect abnormal function of the retina (the light-detecting portion of the eye). Specifically, in this test, the light-sensitive cells of the eye, the rods and cones, and their connecting ganglion cells in the retina are examined.