Because they are IDE and programming related, I am moving a few postings from another unrelated topic to here… as it is a good place to discuss various IDE and programming methods.
First I will reference this topic as it seems related, but ended up being more a “Blame Blynk” thing then a “this is how the IDE works” thing 
[SOLVED] Multiple #include across IDE tabs causing multiple definition errors
Then I am pulling related posts from this topic so as not to further bloat the Project made with Blynk Topic.