In addition to numerical values, you can type mathematical expressions in the cells of the 2D analysis dialog box.
If the expression starts with an operator, the current value of the cell will automatically be prefixed to the expression.
For example:
=+1 adds 1 to the current value.
=+500 mm' adds 500 mm to the current value.
=*2' multiplies the current value by 2.
= L assigns the value of the variable L.
To modify expressions, see the following instructions.