Basic criteria used for line drawing include accuracy, clarity, and consistency. Accuracy refers to the correctness of proportions and measurements in the drawing. Clarity refers to the legibility and visibility of the lines in the drawing. Consistency implies uniformity of lines in terms of thickness and style throughout the drawing.
In a drawing, a centre line is used to show the centre of a part.
For shortening a long same sized drawing
A leader line is a thin line on a design or blueprint that is used to connect a dimension line with a particular area or point on the drawing.
Measuring stuff or drawing a straight line.
Line weights, or the varying line thicknesses used in engineering drawing, are essential in creating a drawing that communicates efficiently.
a heavy solid line used on a drawing to represent the outline of an object.
Alphabet of line is the usage of line types on a drawing. They are used to describe the various features of an object to the person reading the print.
A continuous graph that shows change over time.
This command is used to create single line text in drawing
Used for drawing horizontal lines. To support set squares when drawing vertical line and inclined lines.
PL is Poly Line which is a continuous line that while drawing it with pressing right click of the mouse you can choose to draw arch or line or . . . CL is Centerline and used in Working Drawing which is the final stage of a Drawing and has to be accurate and without mistakes. CL is used to show the center of the mail walls of each floor and while measuring, you will use the the Center to Center (c/c) dimansions instead of outer or inner surfaceof the walls. I hope this can help you
Medium solid line