Step by step instructions:
1. From the Home window, expand the Data Management branch and double-click the Railcars Update branch.
2. Highlight the railcar(s) that you wish to assign to a particular pool. Click on a railcar and then hold the Control key and click on other railcars to enable the multi-select feature. If you wish to select a lot of railcars that are all together, click on the first railcar and then hold the Shift key and click on the last railcar to select those and all railcars in between.
3. Click on the Pool Assign button.
4. Click on the pool that you wish to assign the railcar(s) to and click the OK button.