Assuming that you have Acrobat Exchange, you can save a pdf file that you are viewing in a browser to your hard-drive. If you are not viewing a pdf file, you can save any webpage as a pdf by "printing" it in the same manner as with any other application.<br>
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If you simply have the free Acrobat Reader, then you will need to purchase Acrobat in order to create/save pdf files.<br>
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I hope I understood your question correctly and was able to help.