# Dimension Tool
Create dynamically dimensioned viewpoints and reporting direct from your Navisworks model.
Dimension Tool is a tool for defining basic dimensions against geometry and having those dimensions appear on view reports. The requirement for this tool is to have a unique identifier in the model to allow the dimension to link to the selected objects. The dimension data is stored in a file created alongside the Navisworks® file, so if this file is deleted the dimension information will be lost.