Views 

In order to place the image on a sheet of paper, the projection object is conditionally placed in the middle of an imaginary cube and this object is projected onto its sides. The sides of the cube are unfolded to a displacement with the front view and images are obtained that are called views - these views are called main (Figure 3.1.1.). A view is an image of the object turned towards the observer. The front view is considered the main view. The main view should give the most complete idea of ​​the projection object. The drawing of the part should contain a minimum number of views, sections and cross-sections, but sufficient to make it possible to read the drawing.

Figure 3.1.1. Views

1.  Front view; 2. Top view; 3. Left view; 4. Right view; 5. Bottom view; 6. Rear view; 7. Lines of communication.

Views are divided into main, local, additional. Main views are obtained by projecting the object onto the main projection planes (Figure 3.1.1.). Local view (Figure 3.1.2.) is an image of a separate place on the surface of the object. Local view is indicated by the letter "A", etc., and the view associated with it is indicated by an arrow indicating the direction of view and the corresponding letter.

Figure 3.1.2. Local views

Additional views are images obtained on projection planes not parallel to the main projection planes. Additional views are used when the image is projected onto the main projection planes with distortion. Additional views are not indicated if they are placed in the same projection relationship (Figure 3.1.3.). If the projection relationship is broken, the additional view should be indicated with the appropriate letters and an arrow (Figure 3.1.4.).

Figure 3.1.3. Additional view in projection relation

Figure 3.1.4. Additional view without projection connection

If the additional view is rotated, it should be depicted with the corresponding letters and arrows and the appropriate designation added (Figure 3.1.5.) 

Figure 3.1.5. Rotated additional view