This is my first post on this site. I have done some searching here and elsewhere and was unable to find an answer, so here goes:
I'm working on a story that exists both in real-world Earth and a separate dimension, and time elapses at a different rate in the otherworld. I'm building a timeline for both worlds in PowerPoint to track events, history, etc, and it's slow-going because it's basically a manual process in PPT, plus the space constraints of the slide fields are becoming an issue for me.
Can anyone recommend software (freeware or licensed are both fine) or other methods where it's possible to build an intuitive parallel timeline that simultaneously tracks 2 different time measurements (Earth years vs. otherworld years) that can also accommodate dozens of overlapping events in each? I've searched all standard sources and most of these programs are built to track a single timeline and not something out of the ordinary like this.
Below is a screenshot of a loose version of what I am currently doing, without the actual details of events, just placards to give you an idea.
Any suggestions are welcome, and if there is a different forum or subforum where this would be more appropriate, please let me know.