As with many other types of files to pdf documents can also be protected. When this password can be set as the opening of the whole document, and to perform separate manipulation of them, for example, copying or printing. What to do if you have downloaded from the Internet a pdf file, but can not open it, because I do not know the password? Open a pdf file protected in two ways: to restore the password to the document, or to remove the password and keep an unprotected copy of the document, which can be freely opened. These tasks can easily handle software Manyprog PDF Password Recovery. Using it, you can recover pdf password or remove protection from pdf in just a few minutes.
Many users do not know that pdf files come in several types, although probably noticed differences between some pdf documents.
1. PDF documents, representing image. In these documents, there is no text layer, so it is difficult to work with. They can not be copied or text to search for a given word or phrase. These files are produced when you scan a document or photograph it, and then saved as a pdf file.
2. PDF documents that include only the text layer, and received applications from MS Office. These pdf files are obtained, for example, when you create a document in Word, and then save it as a pdf. These documents can easily copy text or search.
3. PDF documents that allow you to perform a search function. They include two layers. In the upper layer contains an image of the document, and under it there is an invisible layer of text. These pdf documents obtained during execution of detection, for example, when you perform a scan with the recognition and save the received document in pdf format.
4. PDF documents with text vector images. They are pdf files received by preservation of vector editing. This file type is rare, and they can not copy the text or search.