Move coursor over description to show help picture. To close click inside of help window.
Move coursor over the Special Rule and then click right/left button to show it.
Move coursor over the Level and then click left mouse button to add it. If you want to remove it click left mouse button again. You need to add lower lever before you are able to add higher (i.e you can't add FSP:6 without adding FSP:5). The same rule applies for removing level - you need to remove higher level before you are able to remove lower one.
Select Alternative Units
Click triangle icon near unit, then select "Alternative Unit" and click left mouse button.
Move coursor over the unit and then click right mouse button to show their statistics.