1. To select an entire column, click on the column header. For example, click on the column header "A" to select column A. To select an entire row, click on the row header. For example, click on the row header "1" to select row 1.

2. To select a range of cells, click on the first cell in the range, hold down the "Shift" key, and click on the last cell in the range. For example, to select cells A1 through A5, click on cell A1, hold down the "Shift" key, and click on cell A5.

3. To select a non-contiguous range of cells, hold down the "Ctrl" key and click on each cell in the range. For example, to select cells A1, A3, and A5, hold down the "Ctrl" key and click on cells A1, A3, and A5.

4. To select the entire worksheet, click on the "Select All" button in the upper-left corner of the worksheet.

5. To select an entire column, click on the column header. For example, click on the column header "A" to select column A. To select an entire row, click on the row header. For example, click on the row header "1" to select row 1.

6. To select a range of cells, click on the first cell in the range, hold down the "Shift" key, and click on the last cell in the range. For example, to select cells A1 through A5, click on cell A1, hold down the "Shift" key, and click on cell A5.

7. To select a non-contiguous range of cells, hold down the "Ctrl" key and click on each cell in the range. For example, to select cells A1, A3, and A5, hold down the "Ctrl" key and click on cells A1, A3, and A5.

8. To select the entire worksheet, click on the "Select All" button in the upper-left corner of the worksheet.

9. To select an entire column, click on the column header. For example, click on the column header "A" to select column A. To select an entire row, click on the row header. For example, click on the row header "1" to select row 1.

10. To select a range of cells, click on the first cell in the range, hold down the "Shift" key, and click on the last cell in the range. For example, to select cells A1 through A5, click on cell A1, hold down the "Shift" key, and click on cell A5.

11. To select a non-contiguous range of cells, hold down the "Ctrl" key and click on each cell in the range. For example, to select cells A1, A3, and A5, hold down the "Ctrl" key and click on cells A1, A3, and A5.

12. To select the entire worksheet, click on the "Select All" button in the upper-left corner of the worksheet.

13. To select an entire column, click on the column header. For example, click on the column header "A" to select column A. To select an entire row, click on the row header. For example, click on the row header "1" to select row 1.

14. To select a range of cells, click on the first cell in the range, hold down the "Shift" key, and click on the last cell in the range. For example, to select cells A1 through A5, click on cell A1, hold down the "Shift" key, and click on cell A5.

15. To select a non-contiguous range of cells, hold down the "Ctrl" key and click on each cell in the range. For example, to select cells A1, A3, and A5, hold down the "Ctrl" key and click on cells A1, A3, and A5.

16. To select the entire worksheet, click on the "Select All" button in the upper-left corner of the worksheet.

17. To select an entire column, click on the column header. For example, click on the column header "A" to select column A. To select an entire row, click on the row header. For example, click on the row header "1" to select row 1.

18. To select a range of cells, click on the first cell in the range, hold down the "Shift" key, and click on the last cell in the range. For example, to select cells A1 through A5, click on cell A1, hold down the "Shift" key, and click on cell A5.

19. To select a non-contiguous range of cells, hold down the "Ctrl" key and click on each cell in the range. For example, to select cells A1, A3, and A5, hold down the "Ctrl" key and click on cells A1, A3, and A5.

20. To select the entire worksheet, click on the "Select All" button in the upper-left corner of the worksheet.