What does locking a global filter achieve in data visualization?

Locking a global filter in data visualization achieves the purpose of preventing changes to that filter. When a global filter is locked, it ensures that the user cannot alter its settings, which maintains consistency across the data visuals that depend on it. This is particularly useful in scenarios where specific criteria need to be upheld for analysis or reporting, allowing for a stable perspective on the data without accidental modifications by users. It helps analysts or stakeholders to focus on specific aspects of the data without the risk of unintentionally altering the filtering parameters.

The other options don't capture the intended function of a locked global filter. For instance, modifying easily refers to flexibility in changing filter settings, which contradicts the concept of locking. Disabling all filters suggests complete inoperability, which is not aligned with the purpose of a global filter. Lastly, while locking allows a universal application of the filter across multiple visuals, the primary function is about preserving the filter's settings rather than its application status alone.