Opening and Saving PDF Files
Master PDF Editor is fully compatible with PDF specification 1.7 and also supports files with dynamic XFA forms, which allows the application to open and view any files created in other PDF editors while saving their settings.
Opening PDF files
To open a PDF document in Master PDF Editor, use one of the following:
- Open the File > Open menu or press the Ctrl+O shortcut. Then browse for a PDF file you need in the open dialog and open it.
- Click the Open File
toolbar button. - Drag-and-drop a PDF file from another application to Master PDF Editor.
- Right-click a PDF file in any Explorer window to open the context menu and select the Open with Master PDF Editor item.
You can also open PDF files saved from the Internet or local network or received by e-mail.
Opened files are displayed as tabs in the view area:

Opening recently opened files
Master PDF Editor remembers recently opened files. You can quickly reopen any of them as follows:
- When Master PDF Editor starts, select one of the recently opened files on the Start page.

- Select the File > Recent Files menu and click a recently opened file there.

- Click the down arrow ▼ next to the Open File
toolbar button.

To clear the history of recently used files, select File > Recent files > Empty recent files list.
Opening a protected PDF document
Password protection allows you to prevent unauthorized persons from performing certain actions with the document. Without the password, a user cannot open the document or is not allowed to edit, print or comment the document. There are two types of protection.
- With a password
- The first one is a password to open the document. If you just want to share the document with another person and do not want others to be able to open it, you most likely need a password to open.

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- The second type is a permissions password. A permissions password allows only the selected actions and prohibits all others. So, for instance you may create a password that allows viewing and commenting the PDF document, but does not allow printing or editing.

- With a certificate. Securing a PDF file using a certificate is a reliable way to limit the scope of persons who can access the document. The encrypted document will only be accessible by recipients whose certificates are explicitly included to the list of valid recipients for this PDF document. If the certificate is not included, the following window pops up:

More detailed information is provided in the Document Properties section.
Opening PDF documents locked by another instance
If Lock file from opening by other instances of Master PDF Editor is enabled, another instance can be opened only in a read-only mode.

If enabled, a lock.pdf.lock file is created when opening other instances. In this way, another instance can be opened only in a read-only mode. The lock.pdf.lock file is a temporary file that is automatically deleted when all instances are closed.
At the same time, a work opened in other instances can be saved only to another file.

If Lock file from opening by other instances of Master PDF Editor is disabled, other instances can be opened and edited.
Saving PDF Files
Saving
You can save changes made to a PDF document opened in Master PDF Editor using one of the following ways:
- Select File > Save in the main menu or click the Save button
on the toolbar. You can also use the Ctrl+S keyboard shortcut. This will save the modified document under the same file name. - Select File > Save As… in the main menu or click the Save As… button
on the toolbar. You can also use the Ctrl+Shift+S hotkey. This will save the modified document as a new PDF file.
To export a PDF into a variety of image formats, select File > Export to > Images.
NOTE: Saving a digitally signed PDF file renders the digital signature invalid. You can read more about digital signatures here.
Optimizing PDF document
Optimization of a PDF document reduces its size by removing unused elements and compressing images and forms. You can read more about optimization here.
Select the File > Save Optimized As menu item to save the optimized file under a different file name.
Exporting PDF to images
You can export a PDF document to a collection of JPEG, TIFF, BMP or PNG images. Read more about exporting to images here.
Select the File > Export > Pages to Images menu item to export the PDF document to images.
Exporting PDF to text
If you want to extract all text from a PDF document, use File > Export > Pages to Text. The following dialog window opens:

Specify a file name of the text file to save all texts from the PDF document to. You can export all pages into the same text file or save each page of the document into a separate .txt file. The Page Range option allows you to limit the scope of pages to export.
More like this:
Encryption PDFs with a Password
Securing PDFs with a Certificate
Optimisation and Saving
Export PDF Document to Image file
Document Navigation
