You'll need to do it elsewhere and provide a link. If you don't have a place you can post it, you can with a free account at Acrobat.com. Upload the file, share it, and post the link here.
OK, now how do you want it to behave? For example, should the user be able to select just one, or more than one? How will the PDF be used? The more details the better.
The PDF represents a design template. Anyone of the balls may be filled in. The balls represent soldering points for a printed circuit therefore any combination is possible. Once filled in the pdf will be sent to the manufacturer as an order form.
• work yourself silly by smartly placing a checkbox with the Circle symbol at every possible location. The resulting form would be pretty obese, and may even break down under its own load…
• Have a smart field where you read out the cursor position and then add something (field, annotation, etc.) at that location. This would keep the whole thing smaller. However, elaborating this solution would get beyond the scope of this forum, and might more be something for a job offered item (or contact me in private .Hope this can help.