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how do you specify a specific length in a sketch?

in General
Comments
https://learn.onshape.com/collections/onshape-fundamentals-cad
HWM-Water Ltd
If I being honest, sketching is the same here as it is in every other real parametric CAD software I have used.
What would you like to see that is more intuitive than defining a length with a dimension?
I have seen some like solidworks that will give you the option to automatically add a dimension while sketching a line. But that does more harm than good IMHO.