Another great example of great programmers being useless as UI designers. So, what do we see here? An app, which sole purpose is to read, highlight, work on notes and make a decision if you want to keep or delete it. So that's why least often used buttons remove and archive is under drop down menu, meanwhile most useful button - to set up fonts and other (which you do usually ONCE per setting up the app) are always on toolbar

(need to chill with sarcasm, but I hope you'll get what I mean anyway)