SH Jack the Ripper

I am in the Baker St Flat putting together the Annie Chapman timeline but I've made some wrong choices and can't seem to back out of it. The reset button won't work and I can't find a way to undo my choices. Unfortunately, my other saved game would take me a long way back. Any suggestions on how to pick the right document after I have already picked the wrong one?

Jenna,

When you place a corrrect time on the top of the chart, it would not be moved anymore.
If it is wrong you can still click-hold-move it to the correct time.
Double check and see.

Thank you-I was able to get it figured out!

Great!