By default, Excel uses relative reference. For example, cell D2 references (points to) cell B2 and cell C2. Now, select cell D2, click on the lower right corner of cell D2 and drag it down to cell D5. Cell D3 references cell B3 and cell C3. Cell D4 references cell B4 and cell C4. Cell D5 references cell B5 and cell C5. In other words: each cell references its two neighbors on the left.