how to transcribe envelopes

Here is an example of what I did in the Letters from Students file.

https://catalog.archives.gov/id/40492248/2/public?contributionType=transcription

If you look through to the later envelopes, someone else did it a bit differently.

It's a great question, Lenore!  When the researcher finds the image, won't they be able to see that it is an envelope with a stamp and handwritten in ink or in pencil?

With the current instructions, it certainly makes sense why transcribers think they need to add notes about every detail.  But, does it make the image more searchable or readable? 
I also look forward to the seeing the answer to your question. 

Examples from the instructions:
[added by hand “#1”], or "Thank you. [added by hand at the bottom in black ink.  “My choices. Please make final decision. GRF”]  [added slightly below in blue colored ink “#1 B.F.”] "