Export Single Frame

First of all, love this tool. My request: being able to export a single frame.

I am using the app to make an animatic. And sure enough, I find myself having to go back and add new frames as the timing feel calls for it.

Right now, I can only export the whole scene, which leads to unwanted duplicates.

It would be cool if, durning my animatic editing, I can just pull open the app, make my new frame, export it by itself, then go back to animatic editing.