TFLA-01 has a menu where some configuration settings
can be changed. The settings are stored permanently without user invocation. The
data storage depends on the operating system: While on Unix the settings are stored
in a configuration file ($HOME/.qt/tfla-01rc), the registry
is used on Windows.
changes the color of the drawing line of the data plot. Note that the background is always black.
and changes the color of the left marker (set with the left mouse button) and the right marker (right mouse button), respectively.