Revit Certification Practice Test 2025 - Free Practice Questions and Study Guide.

Locking dimensions in Revit is a way to ensure that your design remains consistent and that certain parameters do not change unintentionally during the modeling process. When you select a dimension and click the 'Lock' icon, it creates a constraint that prevents the geometry associated with that dimension from being modified if the dimension itself is altered.

This functionality is crucial for maintaining control over the layout and positioning of elements, especially in complex models where dimensions may otherwise shift during adjustments. Locking dimensions helps to preserve the intended design relationships and improves the overall integrity of the project.

The other methods mentioned do not provide the same level of control or are not designed for this functionality. Grouping dimensions, for example, organizes them but does not impose any restrictions on their movement or alteration. Drawing a rectangle around them would not apply any locking constraints; it's merely a way to visually group elements without affecting their functionality. Saving the file is essential for data retention but does not influence how dimensions behave within the project.