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confusing interface

The DJ is confused

The program does exactly what the DJ wants, right? Well, not quite.

How am I supposed to
know which volume scale
is for which track?

The problem is that even though the program technically works, it has
a confusing interface. All of the checkboxes are added on the left of
the interface, and all of the volume controls are on the right.
There’s nothing in the interface that indicates which volume scale
goes with which track.

Track #1 or track #2?
Track #2 or track #1?

The checkboxes are labeled with the filename of the track, but the
volume sliders aren’t. Even though each volume slider is linked to a
single track, there is nothing in the interface that tells the user which
track that is.

So... what to do? You could just add labels to each volume slider.
That would probably fix it, but adding more widgets, like labels, can
make an interface more complex. And you want your interfaces (and
your GUI code) to be simple and clean.
Fortunately, there is a way of rearranging the widgets in the interface
to make it a lot clearer.

T o avoid confusion,
the GUI needs to look
something like this.

362 Chapter 10