Measuring properties of objects in videos with LoggerPro

You can watch the video by pressing the "play" button down in the lower left-hand corner of the video. To move forward or backward one frame at a time, press the ">>" or "<<" buttons.

To start the marking process, return the video to its starting point and click on the icon that looks like this:

Then click on small dots painted on the carts. Each time you click, a point should appear on the graph, and the video should move forward one frame.

To switch from marking one variable (say, position of cart 1) to a different variable (say, position of cart 2), click the "traffic light" icon:

Each time you click this icon, the horizontal line will switch to a different color; when you go back to the video and click on an object, its data will be placed into a different column, and shown on the graph in a different color.

You can define new columns based on existing data. You can also fit lines and curves to the data.