Hello, I noticed that the LM of my A330 Wilco, there's a function (?) Should calculate, takeoff trim value. I just can not understand how it works. The manual does not even mention it gets. As you can see from the screen there is a written "TRIM" but nothing more. The field value is that the fuel of the second tank .
And then the trim?
Moreover, the situation provides a ZFW of 242,353 pounds, it seems appropriate then to set the trim off.
You, how to calculate it?
Thanks