Before deleting any rows, make certain that the last row of valuable data is the last row of valuable data, especially if the workbook is used by more than one person.

HideUnhide Scroll Bars and Reset the Vertical Slider Range in Excel.

Former Lifewire writer Ted French is a Microsoft Certified Professional who teaches and writes about spreadsheets and spreadsheet programs.

Scrolling in Excel refers to moving up-and-down or side-to-side through a worksheet using the scroll bars, the arrow keys on the keyboard, or the scroll wheel on the mouse.

By default, Excel displays horizontal and vertical scroll bars along the bottom and right side of the Excel screen, but you can hide them from view.

If you want to increase the viewing area of the worksheet, hide the horizontal and vertical scroll bars.

Scroll down to the Display options for this workbook section (about halfway down).

To hide the horizontal scroll bar, clear the Show horizontal scroll bar check box.

If the number of sheets in a workbook increases to the point that the names of all sheets cannot be read at one time, one way to fix this is to shrink the size of the horizontal scroll bar.

Place the mouse pointer over the vertical ellipsis (three vertical dots) next to the horizontal scroll bar.

Drag to the right to shrink the horizontal scroll bar or drag to the left to enlarge the scroll bar.

The slider in the vertical scroll bar the box that moves up and down the scroll bar changes in size as the number of rows in a worksheet containing data changes.

As the number of rows increases, the size of the slider decreases.

If a worksheet has a small number of rows containing data, but the slider is very small and moving it causes the worksheet to jump up or down hundreds of rows, a row or a cell far down the worksheet may have been activated.

To fix the problem, find and delete the row containing the last activated cell.

Changing the alignment of a cell, adding a border, or applying bold or underline formatting to an empty cell may activate a cell.

To find the last row in the worksheet containing a cell that has been activated.

If rows that contain good data are accidentally deleted, the easiest way to get them back is to have a backup copy.

Press the CtrlEnd keys to move to the last cell in the worksheet.

This cell is the intersection point between the lowest activated row and the rightmost activated column.

Since you cant be sure that other rows have not been activated between the last row of good data and the last activated row, delete all rows below your data and the last activated row.

Select the row header with the mouse or press the ShiftSpace keys on the keyboard.

Right-click the row header of one of the selected rows to open the context menu.

Unhide Columns In Excel 2008 For Mac