Screen colors are customizable. Pointing the mouse cursor to a given point on the graph reveals the voltage, raw sample value, local, gmt, and sidereal times of the observation. You can zoom in by right clicking the mouse and dragging a rectangular sub region. Another nifty feature available with mouse clicks is that you can find the voltage and time differential between any two points on the graph. This is very handy for interferometer observations like this one when you want to determine the time between fringes.
Every observation is represented by two files, a data file, and a header file.
The header file contains information important in interpreting the data. Additional information can be referenced with an optional Append file. Additional information is available on this website regarding the building of two simple and inexpensive analog to digital converters which can be used by the Data Collect Lite programs.