This is something I discovered by accident recently. It works in
all editors everywhere (i.e., also outside NetBeans IDE and also
in, for example, browsers). But, if you don't know about it, it is
really helpful (once you do know about it). If you do
know about it, it is really "duh". So, this is written for those
who don't know about it (so please don't leave comments that
basically say "duh").
In the Source Editor in the IDE, you often need to select a
single line, for...