I guess the problem of living in a parallel universe has risen again, insisting on using a dated medium like manila paper to the exclusion of either cheaper and easier to use mediums or alternately taking a professional approach and using modern materials in the form of robust clear plastic sheet are both too complex for you to comprehend. In the era of manila paper the tough, flexible and perfectly clear sheet plastics did not exist, neither did high powered CAD software, plotters and design software and like it or lump it, modern tailoring uses all of the latest things where it adds up to a production advantage.
In OZ where I live rolls of tissue designed for the purpose are cheap and easy to get, easy to cut and translucent so its easy and fast to trace an existing pattern rather than messing around trying to tape bits onto manila to perform modifications. As the vast majority of rag trade folks can pin up accurately, can draw on tissue with either pencils or pens and can cut out accurately, I wonder why you seem incapable of doing such simple things.
In the context where I make things that don't change, I cut out a clear plastic template, write any info I need with a spirit based felt tip and use it to mark out various small items like pockets, flaps and similar small knick knacks. They are that robust that they don't wear out, you main risk is losing them.
With DE's original question, various people have made suggestions and DE has made his choice based on his own preference, I wonder why we have had to suffer this tirade of nonsense, simply because of your inexperience or incapacity to use things that people have done for years and further that you don't have the capacity to produce professional production mediums in plastic sheet like polycarbonate (GE Lexan) for highly robust production environments.
You need to get used to the idea that there are many ways of doing things, manila paper does the job but its not the easiest, fastest, cheapest and its not as good as the range of mediums available. Tailoring has been going on since the days of bone needles and stitching animal hides together with sinew while sitting in a cave lit by campfire and while it certainly has improved a lot over time, it has never been a fixed "politically correct" way of how things should be done.