TFLA-01 has a Settings 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.
Change foreground color changes the color of the drawing line of the data plot. Note that the background is always black.
Change color of left marker and Change color of right marker changes the color of the left marker (set with the left mouse button) and the right marker (right mouse button), respectively.