Communication, Visualization and DocumentationThey support a constant and effective graphic language, and they are utilized for manufacturing, engineering, scientific and industrial purposes.American National Standard Drafting Manual (Y14) .Oblique, Perspective, Multiview and Axonometric. Drawing scale is the magnification or reduction of the drawing compared to the actual object size. The scale is a ratio of the number of drawing unites to the number of real object units. If the scale is 1:2, this means that the drawing has been halved relative to the actual object size.The title block is located in the lower right corner of the drawing template. It contains all the data that defines the drawing and helps to verify its validity. Those data includes the the name of the person who drew the object, the drawing title, drawing size and scale, sheet number, sheet revision block, drawing number, CAGE code, approval block and the weight of the object. Dark lines, accented ends, and sharp corners. The hidden lines should be medium and black. Construction lines should be thick and light. Cutting plane lines should be thick, black and visible. Dimension, centerlines and extension lines should be thin, sharp and black.ASME Y 14.5 M is the usual font type used. Gothic is the most commonly used font for engineering drawings. 2 different fonts should not be used for the same drawing.Dark lines, accented ends, and sharp corners. The hidden lines should be medium and black. Construction lines should be thick and light. Cutting plane lines should be thick, black and visible. Dimension, centerlines and extension lines should be thin, sharp and black.The benefits are time effective tools since they allow quick drawings; they are very accurate; CADD systems have the ability to display spatial and visual information in different ways.To plan the drawing (especially for a complex object). Understanding the techniques help to analyze complex objects, viewpoint, shading, edges, vertices, points, lines and angles.To communicate efficiently and increase the constructive visual ability. It is a 2D representation of a 3D drawing. It is the view of an object as seen by the observer from a chosen perspective. A pictorial drawing can be made in 3 views: oblique, perspective and isometric. The pictorial sketches are sometimes more easily understood by the observer as compared to front, top and side views of the drawings. Pros: -Easy and quick to draw; very easy to understand.Cons:-Only 3 side views are available; important details might be left out; some lines are difficult to draw with dimensions.Sketching before modelling gives a pictorial visualization of how the object should be modelled. Dimensions can be included on the sketch in order to make things simpler while modelling. Also, any specifications or exceptions can be included on the sketch so that the model can easily be made.