Note on March 30, 2020: I have uploaded a significant revision to the template that greatly improves vertical alignment between adjacent diagramming symbols. I encourage any who have used an earlier version to download again to get this significant upgrade.
Note on June 1, 2020: I have uploaded another revision that shortens the length of many symbols. In my experience diagramming in this environment, I sensed that I was taking time to shorten well above 50% of the diagramming symbols. I have shortened them enough that I don't think they'll seem excessively long with any but perhaps the shortest words. Lengthening will now be required for numerous words , but I don't think these symbols will need to be lengthened nearly as often as the longer ones needed to be shortened for attractive appearance and space efficiency. I hope that the current length will provide for pretty close to maximum time efficiency.