How do I lock a value in a cell in Excel?

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Follow these steps to lock cells in a spreadsheet:

  1. Select the cells you want to lock.
  2. On the Home tab, in the Alignment group, click the small arrow to open the Format Cells pop-up window.
  3. On the “Protection” tab, check the “Blocked” box and then click “OK” to close the pop-up window.

How do I constrain a cell to a specific value?

Restrict data entry

  1. Select the cells in which you want to restrict data entry.
  2. On the Data tab, under Tools, click Validate. …
  3. From the Allow context menu, select the type of data you want to allow.
  4. From the Data pop-up menu, select the type of throttling criteria you want, and then enter the throttling values.

How to create a maximum value in Excel?

How to create a MAX formula in Excel

  1. In a cell, type =MAX (
  2. Use the mouse to select a range of numbers.
  3. Type the closing Parentheses.
  4. Press Enter to complete your formula.

How to set a maximum cell value in Excel?

Select a cell where you will place the formula, type: =MaX(20,(SUM(A5:A10))), A5:A10 is the range of cells you are summing and press the Enter key.