[Isaac Harned]

We use layers, but in a couple of outlying workflows from the rest of the industry. Much of what we do is marking up an already crowded print, so having the ability to shut some of those off can be very useful.

We also have forms where we activate / deactivate certain charts on the page (using scripted dropdowns) depending on testing requirements, giving the field some flexibility for the annual verifications we go through.

I do wish more mechanical pdfs were distributed with the layers still active. Most of that metadata is usually gone when we get it.