If you start radare2 in debugging mode like:
r2 -d /usr/bin
you'll be prompted with something similar to:
If you press V for the prompt, you get debugging view with panels. Then, if you select the Stack panel using the Tab key, press the E key, type
pxr 256@r:SP, you get this view (this is thanks to this answer), you get what I'd like to be the default view
How do I make the above window the default view for when I enter:
r2 -d /usr/bin and then V.