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.
An electroretinography (ERG) test, also known as an electroretinogram, measures the electrical response of the light-sensitive cells in your eyes. These cells are known as rods and cones. They form part of the back of the eye known as the retina. There are around 120 million rods in the human eye and 6 to 7 million cones.