I tried the answers in How to navigate to a different directory in Jupyter Notebook?, but they didn't work for various reasons:
Some answers are "how to permanently change your Jupyter start-up folder" which I don't want to do. I already did this, I set my start-up folder and I like it. Sometimes I just need to move around.
I tried changing my directory in Anaconda Prompt and launching lab, but it still takes me to my default start-up folder.
cd/d D:\Documents\my_new_folder
jupyter lab
Confirmed the cd worked.