CAD Essay Example


Computer aided design is a software used by architectures and engineers in the development of structural drawings both in two dimensions and three dimensions. It is software developed with the aim of increasing the productivity as well as the quality of structural drawings that are made. This type of technology utilizes computer systems in the creation of design, their analysis, and modification and finally design optimization process.CAD is made of two main components software and hardware. Hardware refers to the physical, tangible components as well as their peripherals helping in input and outputting process of data. The software has special packages responsible for the manipulation of shapes depending on the user interaction. There are several commands which make the use of computer aided design software user-friendly (Gopsill et al. 2016).


CAD provides a range of commands which makes it easier for the user to perform the basic operations on the CAD software. They include the following:

Line command: It is used to help the user to draw lines from one point to the other with a specified dimension that can be adjusted accordingly.

Circle command: This command enables the user to draw a circle of a specified dimension. There are three options for drawing the circle by using a radius of specified dimension. Secondly one can use the diameter of the desired circle. The third way is by identifying three points through which the circle will pass.

Rectangle command Allows the user to develop rectangular shapes (Fitzmaurice et al. 2015).

Polygon: allows user to draw a polygon depending on number of sides required as well as dimensions

Erase command: Enables one to delete any shape or object that does not necessarily need to be in the final work.

Undo command: This helps the user to reverse the last undone action

Multiline command Enables the user to develop parallels lines with predetermined dimensions. This command makes it easier for one to draw parallel lines once when doing a complex drawing (Fitzmaurice et al. 2015).

Trim: This command ensures one can specifically delete a given cutting range. It is helpful when developing complex designs since with trim operation one can do away with unnecessary portions.

Extend: This command allows the user to extend different shapes and lines according to the user preference.essential when making size adjustments to an object.

Offset: This command produces the replicate of a line by a specified distance. It is an important tool when one wants to mirror a line saving a lot of time rather than redrawing the line (Fitzmaurice et al. 2015).


Move: The command allows the users to move an object or shapes from one point to the other on the screen interface

Copy: The command produces a duplicate of the shape or object. It helps to avoid redrawing of the same object if needed more than once (Fitzmaurice et al. 2015).

Stretch: The command allows the user to stretch any portion of an object as defined by the designer.

Mirror: The command develops a copy of a section of an object along the specified axis. This helps to save the time required in redesigning complex structures that need to be done more than once on the same drawing.

Rotate: This type of command allows the user to be able to move an object around the X, Y, Z axes through the desired angle of rotation (Fitzmaurice et al. 2015).

Fillet: It is a command used when the user wants to create a round corner between two lines. A fillet refers to a smooth curve with a specified radius between two lines.

Chamfer: Operates similarly as the fillet command with the difference being the development of an angled corner joining two lines.

Array: Helps to develop repetition of a given pattern for instance circles of uniform diameter around a given shape. The command generates multiple duplicates of an object selected by the user.

Layer command: Helps to develop a new layer or d modify an existing layer through the dialogue box that appears.

Text Develops a single line onto which text is typed.

Dimension: This command provides a feature that allows the user to dimension any object or line.

Scale: This type of command allows the user to resize the selected objects in a proportional way (Fitzmaurice et al. 2015).


Zoom command: It has several functions depending on user needs.The user has two main options of either zooming into the drawing or out of the drawing. This depends on the level of detail one wants to see.

Pan command: Gives the user flexibility to navigate through the entire screen quickly

Drawing commands are meant to make it easier for the users to create objects on the screen easily. Some of the commands are developed through special programming allowing easy development of objects such as rectangles or polygons (Gopsill et al. 2016).


Computer aided design is a powerful software applicable in developing complex technical drawings. Most of the commands are grouped according to their respective functions. Some of the classifications include the following drawing, file management, dimensioning, display control, editing inquiry, and drawing. Commands may be given through several ways such as the pool down menus, the toolbars and finally with the help of the command line.


Fitzmaurice, G. and Matejka, J.F., Autodesk, Inc., 2015. System & method for recommending next commands when using a software application. U.S. Patent 9,063,925.

Gopsill, J., Snider, C., Shi, L. and Hicks, B., 2016, May. Computer aided design user interaction as a sensor for monitoring engineers and the engineering design process. In DS 84: Proceedings of the DESIGN 2016 14th International Design Conference.