editing pdf using preview on Mac

I used the Tools->Annotated->Text selection to write in my pdf but i found that sometimes i am able to write text
at any place and also press enter for starting a new line. But for some places i simply unable to write text.
Infact if start typing it automatically starts on the top left corner.

How can i write at any location using the Annotated Text selection in Preview of Mac.

Rohit BajajAsked:
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Just write in the text box, then move the text box anywhere you want. To move the text box, move the cursor out of the text box, then back in until you see the hand cursor. Then you drag the box anywhere you want. You can resize it too.
Rohit BajajAuthor Commented:
Just want to know also is there any tool to convert pdf to word or any other easily editable format ?
It depends on how the PDF was created. It if was created from a word document that was converted in the computer to PDF, you might be able to edit it with the full (and very expensive) version of Adobe Acrobat (not Adobe Acrobat Reader). However, you would be better to edit the original Word document, the convert it to PDF.

If, on the other hand the PDF was created by scanning, you will not be able to easily convert it to text, because it is just picture, like  jpeg.
This link suggests three ways to convert a pdf to word:  http://www.wikihow.com/Convert-a-PDF-to-a-Word-Document

1. Adobe Acrobat Pro.
2. On-line services.
3. Google Docs.

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There is supposedly a free PDF to DOC converter here: http://download.cnet.com/Free-PDF-to-Word-Converter/3000-10743_4-75732609.html#editorsreview  I haven't tried it myself.
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Mac OS X

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