For Louisiana, we had to fill out experience records as part of the application to take the PE exam. I only had one employer since graduating at the time I applied, but I'd lived in a few states/had different positions so I did one per position/state. Each one was only about a page though and included a paragraph describing general responsibilities, examples of how engineering was used in the position, and then examples of projects.
I wonder how well that will go over when I apply for reciprocity in TX.