When Clicking a Cell, Excel Jumps to a Different Cell

Thank you Lauren G. I was entering data on a worksheet and it wouldn't allow me to enter numbers in the cell; it kept jumping to the cell below it. I didn't realize that I accidentally hit the number lock key. Your comment helped to solve my problem!!
Marilyn

When trying to enter a number in a cell it jumps to another cell in the spreadsheet/won't let you type the number...Make sure "NUM LK" (number lock) is on. It's the top left key in the numeric keypad on your keyboard, above "7." If you bump it accidentally, it will confuse the heck out of you. :-)

I was having this problem on Excel for Mac v. 16.70. The Options(Preferences) solution didn't work.
It turned out that because I have a Wacom Tablet Pen, "Use Pen to Select and Interact..." was checked. I unchecked it and that solved the Selection and Jumping to other columns/cells problem.
FYI -- not many users probably have this odd Pen set-up.
Thanks!

@Ronnie Macdonald
Also, see https://excelribbon.tips.net/C0761_Configuring_Excel.html

@Ronnie Macdonald
Configuration refers to File > Options (at lower-left in newer versions of Excel).

"If the problem is, instead, with all workbooks on the system, then the cause and solution has to do with how Excel is configured." Where is the configuration tab?

The ReportDents macro in My Excel Toolbox will trace direct precedents and dependents for each cell in the active sheet's Selection and report results in a separate '...dents' worksheet with each row including hyperlinks to the source cell and its precedent or dependent target range. For example, if 'Sheet1'!$A$1 contains the formula
=SUM('Sheet2'!$B$1:$B$9)
then the '...dents' sheet will include hyperlinks to 'Sheet1'!$A$1 and its precedent range 'Sheet2'!$B$1:$B$9.
See https://sites.google.com/view/MyExcelToolbox/

For a practical joke (or a dirty trick), add this VBA to the code pane of document module ThisWorkbook:

Private Sub Workbook_SheetSelectionChange( _
    ByVal Sh As Object, ByVal Target As Range)
    With Target
        If .HasFormula Then
            Application.EnableEvents = False
            .showPrecedents
            .NavigateArrow True, 1
            .showPrecedents True
            Application.EnableEvents = True
        End If
    End With
End Sub

When a cell with a formula referencing precedent cells is selected, one of those precedent cells will be selected instead. (If the cell has a formula without precedent cells, a beep will sound; if the cell has no formula, there will be no beep.) This applies whether a cell is selected using a mouse click (left or right), an arrow key, the Go To dialog (F5 or Ctrl+G), VBA code, etc., but not when a multi-cell range is selected.
If Leo finds any similar VBA in the …SelectionChange event code of his ThisWorkbook or Sheet… code panes, he should remove it.