Thanks for your great work, I didn't notice who I am talking to.
Though it doesn't help even on official extension page in both Chrome web store and Microsoft edge add-ons store there is no clear screenshot showing this (tools dashboard after clicking More button few times), if there was clear screenshot of actual advanced/"More" UI with Element zapper/picker, users like me wouldn't have such stupid questions/assumptions and it would be clear from get go.
Because Google feeds on comments like yours to answer your question about whether there is an element picker, it's bound to be wrong.
You can create your own custom filters using an element picker, and you can manually edit them. See <https://github.com/uBlockOrigin/uBOL-home/wiki/Quick-guide>.