Thanks for the reply,
I can't draw the draft for Drawing View automatically instead I can only draw the line manually by myself, it is so annoying. How to fill the Drawing View?
The intent is that you create new geometry in a Drawing View. You can copy geometry from a Base view to a Drawing View, but expect the result to be flattened in that Drawing View plane. A part can have existing geometry in the Modeling environment prior to using Copy to 3D.
To add geometry to a Drawing View, right click the Drawing View border and select "Active Sketch View". Now use the Curve and Sketch tools to create geometry in that view. Once you've added your geometry use Copy to 3D to create a copy of the Drawing View geometry to the 3D Modeling environment. Drafting Sketches become Sketch features in Modeling, however, the copied geometry has no association back to the Drawing View.
I fully agree with Ben reply.
You can also use entities from existing base view in the drawing view (add something to them also ...drawing your own curves on top of the copied curves).Surely lot of options you can avail.