In addition to making changes to Constants and Lookups on the Screen you can also make changes by clicking on the Change Model Constants button 
and the Change Lookups button 
. These bring up dialogs with lists of Constants and Lookups respectively.
| Ø | Click on the Change Model Constants button. |
| Ø | Click on desired strength ratio 1 in the list and then click on Modify or press the Enter key. The current value will appear highlighted in an editing box. |
| Ø | Type in 1.8 and press the Enter key. The model will simulate. You will also see the slider below desired strength ratio 1change in value. |
| Ø | Click on the Change Lookups button. |
| Ø | Click on #attraction armament capacity used 1# (the # signs are added by Vensim) and click on Modify. |
| Ø | Make changes to the Lookup as before then click on Close. |
