We have cell culture imaging data where the cell state changes over time. Within these, we would like to use trackedit to annotate segments of a track as different classes, where it currently only allows one class per track. For example, a cell (track ID) may have state A in time points 0-10, and state B in 11-20. And it would be convenient to define the start and the end of each state, and fill in the intermediate time points.