What are dimension lines used for?

Dimension lines are specifically used to define the measurement of a particular feature in technical drawings and blueprints. They indicate the size and location of features, such as length, width, height, and depth. Dimension lines typically consist of a straight line with arrows at each end, pointing to the points being measured. Along the dimension line, numerical values are indicated, providing precise measurements necessary for fabrication, construction, or assembly of parts. This clarity is crucial for engineers and technicians to ensure that components fit together as intended, reflecting the correct specifications for production.

In contrast, other options like movement lines, decorative lines, or connecting lines serve different purposes in technical drawings and do not convey measurement information, which is the primary function of dimension lines.