LESSON – 4:
4.1 Dimension:
After you have drawn any object, you will need to show the dimension in the drawing. To do that go to Annotation > Dimension. Click the arrow at the lower right of the panel.
You will have the dialog box as below. Click Modify button.
Then you will have the next dialog box:
Then do your modification for Text size, Primary Units, Arrow size etc. After you have finished, click OK. You will be redirected to the previous dialog box. There click SetCurrent, then Close. Then you can use both Home > Annotation ; or Annotation > Dimension to show any dimension.
4.2 Drawing Objects:
Polyline
Keystroke Icon location
PL 
Home > Draw > Polyline
In case of line, you can construct more than one line under one command. But all the lines will be considered as independent lines. But if you use polyline, all the lines constructed under one command will be considered as a single line. The input is same as line.
Ellipse
Keystroke Icon location
EL 
Home > Draw > ellipse
Input can be given in 3 ways:
To draw the below ellipse, the command should be:
• “el”
• Enter (or click icon)
• Select center by clicking giving co-ordinate
• 5'
• Eneter
• 2'
• Enter
You have seen how to define angle in AutoCAD. But during you construct an elliptical arc, you have work with a slightly different conception. In conventional drawing 0° is started from 3 o’clock and then proceeds counterclockwise. But during drawing elliptical arc, the 0° starts from 6 o’clock or negative Y axis.
Spline
Keystroke Icon location
SPL 
Home > Draw > Spline
In arc, there is only one bending in the curve. If you need more than one bending, then you will need Spline. The command is like that of “3 point arc”. Every 3 points will make an arc and it continues as you need.
Example:
• “spl”
• Enter (or click icon)
• Select start point (click on the workspace or enter co-ordinate)
• Specify next point: “5<45”
• Specify next point: “5<315”
• Specify next point: “5<45”
• Specify next point: “5<315"
• Specify next point: Enter
• Specify start tangent: Enter
• Specify end tangent: Enter
Donut
Keystroke Icon location
DO 
Home > Draw > Donut
Constructs a donut like shape of specified radius.
Example:
• “do”
• Enter (or click icon)
• Specify inside diameter of donut: 3
• Specify outside diameter of donut: 6
• Specify center of donut: click any point
Watch the tutorial on “Drawing Elliptical Arc”.
