Good Afternoon Engr. Tope,

I was not able to send you what I promised due to lack of electricity supply last night; bear with me. So

today I begin by introducing you to the Units Settings. Before you start drawing, you must set your units.

The settings can be categorized into two. Namely,

Primary Units Settings

Secondary Unit Settings

The primary units is one that must be set before you begin your drawing e.g lengths, angle, direction

etc. while the secondary units is set after the primary units or as you go on with your drawing e.g layer,

text style, dimension style etc. The secondary unit settings are equally important.

PRIMARY UNIT SETTINGS:

1. Units

2. Drawing Limits

UNITS: To set the units, follow the procedure described below,

then click OK, OK.

DRAWING LIMITS: To set the drawing limits, follow the procedure described below,

Go to Format >> Drawing Limits

Specify Lower Left Corner : Type -500000,-500000 as shown below,

then press enter (or spacebar)

Specify Upper Right Corner: Type 500000,500000

then press enter (or spacebar)

Finally go to view>>zoom>>extents or

Type z (then tap enter or spacebar), then type e (tap enter or spacebar again). FINISH

O! How easy it is. After you successfully complete the above process, your drawing can now begin. But

before we continue, there is another aspect of AutoCAD that is very vital which we must understand. It

is called Layer.

LAYER

Layer in AutoCAD is a system of assigning certain unique attributes to different components of our

drawing. Layer provides a means of organizing our drawing and also making our work presentable. For

example; in an architectural plan of a building, there are different components like walls, doors,

windows, furniture, text, grid lines etc. You can assign an attribute to each component. We can say, let

the thickness of the wall lines be 0.9 mm, let its color be black. Let the lines for door be thin lines, navy

blue color etc.

We are now going to pause here, we shall continue next time from here.

Thanks

Yours Sincerely

OKOLO CHIDI JERRY