there are two easy ways to add a -2. Way 1: you are always wielding the tower shield when in melee, this is the easiest way. Go to the Attacks tab, and in the top section enter a -2 in the Misc column. As in the first screenshot below. Then in the attacks rows for each attack you add, pick "melee" as the "Attack Type". Then the -2 will be applied automatically. (in the small inset in the screenshot). Way2: create a "buff" row. Click on "set buffs" to expand the buffs area, then "add" buff. click on the circled areas in the screenshot to add a "melee" buff of -2. This will also be applied to all melee attacks, but it is easier to turn on and off by checking and unchecking the "enabled" checkbox. Plus you can add a name to it so you remember the -2 is because of the tower shield. You must also pick "melee" (or you can also pick "alt melee" ) in the dropdown for each attack row just as the above method.