Whenever we have to make a 3D model we need to make a Sketch in a 2D plane. We all know that references make it easier for a user to make complex sketches. In making any sketches we usually use line options. We all know that in SolidWorks we have several types of lines. Which can be seen in the picture below.

The first one which is Line is the most used type. The second one i.e., Centerline is often used as a construction/reference line in SolidWorks. Midpoint Line is mostly used to make a line from the midpoint of the line if needed. Usually, a reference line is needed in a complex sketch and it makes the work very simple and easy. The best example is its use in the resolved feature.

In this article, we will look into steps to sketch in SolidWorks using a construction line. The steps are as follows:

• Select a sketch plane and choose the line option, as shown.
• We will now make a construction line by choosing the centerline option.
• Then we need to make the midpoint and origin coincident as shown.
• Now make two semi-circles with construction lines as diameter.
• Then use the revolve feature.

In the above example, we have used a construction line.

Let us look at the steps to change a line to a construction line.

• Choose the line to change.
• In the property manager, you can tick the “For construction” option to change the line.

These are the steps to make a sketch and use the construction line in SolidWorks