I've created a layout template using rectangle frames. I want to use File > Adobe PDF Presets > [Press Quality] to export a pdf version of the layout. However, when I do that, I am not seeing the frame lines. I have checked, Include.. "Non-printing Objects," "Visible Guides & Grids," and have also included, "All Printer's Marks." However, I still am not seeing the lines for the frames in my pdf. What I am doing wrong?
The only way you will see frame outlines is if you actually apply a stroke to the frame.
And to add to Peter's point, the frame boundaries never have been considered “visible guides or grids.” Non-printing objects” are objects that you have specifically put a non-printing attribute on. “Printer marks” are an option that puts trim marks, file names, and color patches in the page's slug area, if defined.