Patent pending drawings

No, A4 paper will do. 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 placed on a piece of paper, and when the drawings are reduced to two thirds, they can still be cleaned and distinguished. You don't need any software to see if you are comfortable. We usually use AutoCAD, of course, some people use Word or Visio. In the application for patent for design, photos can be used, but the shooting requirements are high, and photos cannot be used for utility models or inventions.