I voted essential. I actually had to script it myself so that it is scale-dependent.
By Zone Stamps are not the only things that should be scale sensitive in my opinion. Everything that has Text in it falls into this category: Door/Window Markers, Dimensioning (so I don't have to create separate dimensions for DD and CD phases) and even simple Text blocks should be scale sensitive, by which I mean that in 1:50 scale they are 3.00 mm, but in 1:100 scale they are 2.00 mm.
Having such feature would save a lot of time.
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