Click Annotate tab > Detail panel > Filled Region. Draw filled regions using the Filled Region tool.
Name your Filled Regions under Properties-Comments (optional).
Open Region Ratio tool from the Add-Ins toolbar.
Click ‘Add Filled Region’ and select Filled region from the view.
Select a filled region from the Revit view.
You can track the ratio while modifying the Filled regions.
Create text of the areas by clicking ‘Create Text’.
Export the chart by clicking ‘Export as Image’ and get the calculations saved as an image.