Blood Type Compatibility. Your ABO blood type is based on the presence or absence of the A and B antigens on your red blood cells. The A blood type has only the A antigen and the B blood type has only the B antigen. The AB blood type has both A and B antigens, and the O blood type has neither A nor B antigen.
Green Triangle. The green triangle appears in the upper left hand corner of a cell when there is an error in a formula. Sometimes Excel will report an error when you use text in a box and the program believes it is part of a formula. When you click on the green triangle there will be a yellow box that looks like a road sign with an exclamation point in it. This button is the Trace Error option that will help you correct your formula.
Select the Page Layout tab. Click on the dialog box launcher on the Page Setup group. The dialog box launcher is the little arrow in the bottom right corner of the box. The Page Setup window will pop up.icrosoft Excel does not contain a specific function that allows a user to leave footnotes on the spreadsheet. It is possible, nonetheless, to create comments that are hyperlinked to a cell and then print these comments at the bottom of the sheet.