Protect Specific Cell Ranges in LibreOffice Calc

Protecting specific cell ranges in LibreOffice Calc allows you to lock sensitive formulas and headers while keeping data entry areas open for editing. By default, every cell in a Calc worksheet is marked as protected, but this protection only activates when sheet protection is turned on. To allow editing in specific areas, you must first unlock the desired editable cells and then enable worksheet protection.

Step 1: Unlock the Cells You Want to Keep Editable

1. Open your spreadsheet in LibreOffice Calc.
2. Select the range of cells that users should be allowed to modify. To select multiple non-adjacent ranges, hold the Ctrl key while clicking and dragging over the cells.
3. Right-click the selected range and choose Format Cells… from the context menu (or press Ctrl + 1).
4. In the Format Cells dialog window, switch to the Cell Protection tab.
5. Uncheck the Protected checkbox under the Protection section.
6. Click OK to save the changes.

Step 2: Enable Sheet Protection

1. Navigate to the top menu bar and click Tools.
2. Select Protect Sheet… from the dropdown menu.
3. In the Protect Sheet dialog box:
   • Password (optional): Enter a password if you want to prevent unauthorized users from removing the protection. Confirm the password in the field below.
   • Options: Ensure that Select unprotected cells is checked. You can also check Select protected cells if you want users to be able to click on locked cells without editing them.
4. Click OK to apply the protection.

Step 3: Test the Configuration

• Click inside one of the locked cells and try typing. A warning message will appear stating that protected cells cannot be modified.
• Click inside any of the unlocked cells to verify that data entry and editing function normally.

How to Modify or Disable Protection

If you need to make changes to protected cells later: 1. Go to Tools > Protect Sheet…. 2. If prompted, enter the password you created. 3. Make your required edits or adjust cell protection settings under Format Cells, then re-enable sheet protection when finished.