It's super clear to me now that I know, but when I first started playing the game I had no idea how to remove a blueprint that I accidentally placed. Would be helpful to have a small "B to Remove" prompt on screen when viewing a partially built blueprint. 

https://imgur.com/Ci2v1PQ

I agree. My girlfriend got confused and that was when I realized that this option should be shown.

i disagree,  am i the only one that looks at the button assignments and modifies them to fit my style when starting the game?  I think we have enough clutter on the screen now with all the markers and no filter for them.  I'd not like to see more added.