resources
http://www.thatjeffsmith.com/sql-developer/
https://www.thatjeffsmith.com/archive/category/general/pedia/sqldev/

articles
2018
https://www.thatjeffsmith.com/archive/2018/02/3-quick-sql-developer-tips-to-kick-off-2018/

presentations
2017
Smith
https://www.youtube.com/playlist?list=PL_qNe_aTKkIUUzDEJ7KuvyldBuynyoDb2
    Oracle SQL Developer: You're Doing it Wrong
    https://www.youtube.com/watch?v=rnfO8O2z-Yc

keys
F5 - run
F9 - run current line
F10 - explain plan