Converting 2D objects to 3D in AutoCAD can greatly enhance your drafting and design capabilities. By adding depth and dimension to your drawings, you can create more realistic and visually appealing models. Here are some steps to help you convert 2D objects to 3D in AutoCAD:

1. Use the 'Extrude' command: Start by selecting the 2D object that you want to convert to 3D. Then, use the 'Extrude' command to pull the object into the third dimension. You can specify the height or the direction of the extrusion to create the 3D form.

2. Utilize the 'Sweep' command: For more complex shapes, you can use the 'Sweep' command to extrude a 2D profile along a path, creating a 3D object. This is useful for creating curved or irregular shapes that may be difficult to achieve with the 'Extrude' command alone.

3. Employ the 'Revolve' command: Another method for converting 2D objects to 3D is by using the 'Revolve' command. This allows you to create a 3D object by revolving a 2D profile around an axis. This is particularly useful for creating symmetrical objects or parts that involve rotation.

4. Convert objects to solids: After extruding, sweeping, or revolving your 2D objects, you can convert them to solid models using the 'CONVTOSOLID' command. This will turn your surface models into solid 3D objects, which can be edited and manipulated further.

5. Fine-tune and edit: Once you have converted your 2D objects to 3D, you can further fine-tune and edit them using various commands in AutoCAD. You can adjust dimensions, add fillets, chamfers, and other details to refine the model and make it more accurate.

By mastering the conversion of 2D objects to 3D in AutoCAD, you can take your drafting and design skills to the next level. Whether you're working on architectural plans, mechanical parts, or any other type of design, being able to create realistic 3D models will greatly enhance your work. Practice these techniques and explore other 3D modeling tools in AutoCAD to expand your capabilities and produce impressive designs.