PDF (Portable Document Format)
is a file format created by Adobe Systems in 1993 for the exchange of digital documents. PDF format is used for representing two dimensional documents that include text, fonts, image and two-dimensional vector graphics. In the Acrobat 3-D, the ability PDF document also includes three-dimensional reading. PDF has become the ISO standard on July 1, 2008 with the code ISO 32000-1:2008
The PDF documents
The PDF documents are generally structured on a combination of text, vector graphics, and graphics Raster. The graph shows the vectors used to illustrate the form of lines and kurva, while Raster graphics used to display photos and images. Further improvements in the format, the PDF document is also able to support hyperlinks, forms, javascript, and various other abilities that can be supported with the addition of plugins. PDF documents version 1.6 has the ability to display three-dimensional interactive graphic.
Accessibility
PDF file can be created specifically to be accessible to people with disabilities / physical limitations. PDF file format can be equipped with a label (tag) XML, text equivalent, perbesaran visual text (magnifier), facilities audio / voice, and so forth. Some of the PDF creator software such as Adobe InDesign can automatically create PDF files labeled.
Security and Use Restrictions
PDF file in a password so that it can be to be able to open or edit it required a certain keyword. PDF file it is done in two levels, ie, 40-bit and 128-bit using a complex password system RC4 and MD5. PDF file can also be DRM restrictions to limit the activities of multiplication, editing, and printing the file.
PDF Converter
the conversion process into a data file with the PDF format is not a complicated problem, because this process is the same as the conduct Printing or printing to paper using a printer (printer driver).
Software applications that are most popular and frequently used is Adobe Acrobat Professional (version 8, 2009). This application is a commercial, investment and requires a relatively high, has several powerful features and visual navigation that is easy and familiar.
However, in addition to the Acrobat application, there are many freeware applications that are free or we can download on the internet, only the course, each is a freeware application that has a surplus, and there are also other advantages that have associated with portable data file format , but the one thing that is often not owned by the application that is creating a bookmark freeware.

Create PDF
1. Install Program DoPDF or Adobe Acrobat (free) on your computer.
2. To create a PDF file, Open a document from a Windows application, such as Microsoft Word, Excel, PowerPoint, Internet Explorer, image files, etc.
3. Print or Print the document as you normally do but select the printer named AdobePDF or DoPDF, and then click OK
4. save window will appear.
5. Specify the name of the PDF files
6. Click Save


Adding Bookmark PDF
Bookmark or divider book is given a sign to remember the location on a paper print. On the PDF files, bookmark the withdrawal divider book. Type of constraint is often used books are usually secarik paper form or seuntai rope that is used to restrict the books. Many books that restraint can dijepitkan on the book page for easier reading. Meanwhile, the bookmarks in the PDF file to facilitate the appropriate page to find the keywords you set as a bookmark. Next I create a bookmark using the Adobe Acrobat:
1. Run your Adobe Acrobat program, not adobe reader.
2. Open or open a PDF file from Adobe Acrobat's (select the file that consists of many pages)
3. Open the bookmark bar on the left side of the main window (see picture, red arrows)
4. Use a selection tool for mem-word blocks that will be used as a bookmark. (see picture above, the blue arrows)
5. Then, press Ctrl + B on the keyboard or open the Edit menu>> Add bookmark.
6. Automatically, you have a bookmark or a bookmark for that page. Please create a bookmark for the page is important so that you easily menemukannnya in the process of reading.
7. If you are finished, do not forget to save


Create and Deliver Password

Next steps to provide the password on a PDF file:
1. Open up one of your PDF files
2. Access the Document>> Security>> select Secure This Document
3. Click the New button in the window that appears (Select a Policy to Apply)
4. Then, again a new window appears, select the Use Password and click the Next button at the bottom.
5. Content Policy Name as you want
6. provide a check on the "Save password with the policy" and then click Next.
7. for this step there are several options:
a. select this option if you want to give a password to open the file
b. select the second option if you want to give a password to modify your PDF files.
8. Click Next when done.
9. Enter the password again to make sure you say the password.
10. Then click Finish.
11. The last step is done click apply and save.