Drawing of patent application drawings

if you don't need it, just use A4 paper. As for the drawing size, according to the requirements of the detailed rules for the implementation of the patent law, one or more drawings can be put on a piece of paper, and the drawings can still be cleaned and distinguished when they are reduced to two thirds. What software is not required depends on whether you are comfortable. We usually use AutoCAD, and of course some people use Word or Visio. For an application for a patent for design, photos can be used, but the shooting requirements are high, and photos cannot be used for utility models or inventions.