Alphabet of lines

It represents the axis or center of symmetrical shapes like a ball, washer, rectangular block and cube.

• Visible line

• Center line

• Hidden line

• Phantom line

A short inclined thin line with an arrowhead at the end and short horizontal line on the other end.

• Leader line

• Cutting plane line

• Short break line

• Extension line

A thin line with an arrowhead in one end used to indicate the measurements of the object.

• Dimension line

• Phantom line

• Long Break line

• Secion line

It represents the surface or edges that cannot be seen.

• Center line

• Phantom line

• Visible line

• Hidden line

A thin line that shows position(s) of part of an object that moves drawn by two short dashes and one long dash.

• Phantom line

• Section line

• Leader line

• Hidden line

A thin line that extends from the object in order to show dimension limits.

Also known as the object line.

A short inclined thin line with an arrowhead at the end and short horizontal line on the other end.

A thick lines used to indicate an imaginary cut through an object along the line.

Lines are spaced evenly at 45 degrees to make shaded effect.