I am using SQL Dev v18.1.0.095. For the life of me, I can't figure out what the little colored blocks next to the scroll bar in the worksheet view mean or do. Where they always there, seems like they were introduced in a more recent version. I can see that I can over over them and they display code snippets. But I can't figure out why it decides to highlight some but not all. What do the different colors mean, e.g. yellow/gold vs. pink/fusia? What am I missing?