The first column shows a star or stars. The more stars, the more in depth the jot.
The second column includes a description of what the jot might include. This can be done as an "I can" statement or a checklist format.
The third column is an exemplar jot. I have seen teachers develop these exemplars with students using a read aloud. I have also seen students take their jots from one star and revise it to make it a two, three, or four star jot.
Before developing these charts with students, it might be beneficial to develop a rating chart and exemplars with your grade level teams by looking at rubrics you use or the CCSS. This way you can get a feel for what students are going to go through to grow their reading ideas from one star to higher level jots.