read the handy instruction pages I sent with the program. It'll address all but one of your questions, and show you easy ways to do it.

The height of the fields can not be changed.

Unit value is of the individual units, lot value is for the entire lot. You might have 5 different chips ....and 6 of each one. You have a total lot number of 30.

Yes, you can auto number.

You can also add fields, move fields, delete fields as well has specify what type of field they are, i.e text, check box, drop down menues, etc.

There's also a built in help/instructions function.