Read the _ReadMeFirst.txt file before you start.

Use <F1> to get 4nec2 help.
Print the ..\exe\4nec2.rtf file for easy help-reading.
Consult the _GettingStarted.txt file for even more help.

p.s. starting with version 5.8.0 the _4nec2.rtf file might
be somewhat outdated. For latest help info, please use the
<F1> key or the <Help> menu-function in 4nec2.