I think CNET, who led me to you, either reviewed an early version ... or they reviewed sloppily ... or I didn't read carefully enuf.
I was pleasantly surprised (having read the review, which seemed to say "no can do") to see that arrows and all the other basic annotation facilities ARE up and running. EVEN your own descriptive material - presumably current - doesn't say that clearly enough.... Obviously, you've entered an arena where one competitor has a 20 year (?) and 20 million users headstart. You'll go from zero to 60 (or 5 to 20) faster if you make crystal clear what your strengths are.
First impression of software, documentation, etc. - A++