Protecting ranges

Sharing without fear

When you give the class the edit right, someone accidentally deletes =PRŮMĚR(B2:B6) and writes 2. Protect range locks formulas and leaves only grades in B2:B6 editable — or the other way the dashboard read-only.

The Workbook boss sets who may touch where.

Lock a formula, leave data

1. Sheet Znamky. Select B8 (average). Right-click → Protect range. Description Average — do not change. Only you (or the teacher) can edit.

2. Second protection: C2:C6 Status column with KDYŽ — a formula. B2:B6 leave for editing grades (when you share with a parent).

3. Sheet Dashboard — the whole sheet or C3:C5: View only for others. KPI = links, nobody overwrites to 5.0.

4. Try as a teammate to change B8 — it should reject (or warn). Changing B3 a grade goes through.

5. Exceptions: in the protection settings add a teammate’s email when they may fix formulas. The workbook owner always can.

Sheet vs. range

• The whole Dashboard sheet — the class sees, does not touch.
• Kapesne!F1:F2 — model levers locked, C spending column open for writing.
• Pruzkum!D:E summary locked, column A import editable.

Excel: Review → Protect sheet with a password (write the password down with a parent).

What often goes wrong

Lock the whole workbook. You cannot write grades. You lock ranges.

Forget an exception for yourself. You yourself cannot fix — you are an exception as owner.

Protection instead of sharing view. A stranger cannot edit even by accident — the view right is the first choice.

Now you 💪

First: protection B8 and Dashboard C3:C5.

Second: a test with a teammate — what goes through, what does not.

What to take from this lesson

• Range protection = fewer mistakes when sharing.
• Lock formulas, leave input data (or the other way the dashboard).
• The view right + protection = safer than edit for everyone.

© 2026 Ing. Martin Polak / AlgoRhino · Ketentuan penggunaan konten