What right-click property allows you to flag specific cells to prevent data from being overwritten?

The right-click property that allows you to flag specific cells to prevent data from being overwritten is known as "Locking." This feature is crucial in scenarios where you want to ensure that certain values remain unchanged, particularly in collaborative environments or when data integrity is essential.

When a cell is locked, it restricts users from modifying the content unless they have specific permissions. This capability is especially useful in financial modeling or reporting situations where certain data inputs need to be protected from accidental changes.

Other options like "Spreading" typically refer to methods for distributing or allocating data across a range of cells but do not provide the same level of security against overwriting. "Protection" is a broader term that encompasses various means of securing data, but in most systems, locking is the specific mechanism that applies to individual cells for preventing data changes. "Cell Override" usually refers to the ability to change or override existing data, which does not pertain to protecting cells from being overwritten.