How to break a block in autocad, how to create pdf?

1. Click Home tabModify panelExplode. At the Command prompt, enter explode.
2. Select the block to explode. Press Enter.

How to create PDF from AutoCAD / How to convert AutoCAD drawings to PDF 

1. Start AutoCAD

2. Open an AutoCAD drawing (for example, a .DWG or .DWF or .DXF document)

3. Select from main menu "File"->"Print"

4. Select Printer "Virtual PDF Printer"

5. If you need to adjust PDF generation options, click the "Property" button on the right

6. Click "OK"

7. A dialog will pop up, assign the folder and file name of the PDF document to be generated

8. Congratulations! You have converted AutoCAD drawing to PDF document now.