Try it for yourself. If you dont highlight a cell reference Excel will add the dollar sign only to the cell reference closest to your cursor. Assuming we intend to sum the values in Column C while keeping the value in Column D as D4 in the formula we will add the dollar sign before copying down the formula as shown in Figure 4.
When extending the formula I dont want that top cell reference to change.
Press F4 one time C2 will change to C2. Like A6 if you wish to just change the number 6 serially and keep a constant or A6 if you do not want anything from that reference to change at all. INDIRECT I COLUMN 27 and drag across. C5D5E2 Click E2 in the formula to place the curser between E and 2.