Displays a log of the duct spooling process. To open the log go to %temp% and locate spool.log.
Before
Lists all the spools that existed in the model before you ran the last spooling process.
This is the same list of spools that displays if you select this tab before processing
spools. Expand this selection to see a list of existing spools. If no spools exist,
you will see this logo: 
.
To Do List
Lists spools that have objects in the To Do List. The spools cannot be created until you fix the objects on the To Do List. Click View > To Do List (or press CTRL+T) to view the To Do List.
Modified
Lists all the spools that were modified during the last spooling process. Expand this selection to see a list of the modified spools.
New
Lists all the spools that were created during the last spooling process. Expand this selection to see a list of the new spools.
Clicking a spool, ducting system, or duct part in these lists highlights it in the
model.