Downstream is when you cast in the same direction the current is moving,
and the line goes tight immediately. You don't use a direct downstream cast
very often, but when you do, it's often important to throw some slack into
your presentation, and even reach as the fly drifts down in the current.
There are many ways to manipulate your line in the current to get a fish to
take your fly. Sometimes, you need a full combination of the right casting
angle plus multiple mends in the same drift. No matter what kind of fly
fishing you do, always experiment with different presentations before
What kind of presentation will the fish prefer today? That's something only
trial and error, experience, or the advice of a good guide can tell you.
There are no magic bullets, but when you crack the code, it's a wonderful