To select a group of cells, place your mouse pointer in the centre of a cell. When the pointer turns into a thick white shaded cross, hold the left mouse button down and drag the pointer across the row or down the column of cells you want to select.

-Thick cross

As with the active cell, the numbers at the left ends of the selected rows, and the letters at the top of the selected columns, will be shaded differently. In this image, the cells D2 to D7 have been selected. You can also drag the thick cross pointer diagonally across a block of cells to select multiple column and rows.

Note: If your mouse pointer hovers over the bottom right corner of an active cell, you will see a thin cross (+). If you hold your left button and drag, the formatting or formula in the active cell will be copied into the adjacent cells that you select.