Since PDF is a proprietary format, you typically need a dedicated software utility to view this type of documents outside a compatible browser.

PDF Extra is one of the many options you get, and it also supports some editing operations to make your life easier.

You can easily open any PDF you might need, by either browsing to its location or by dropping it onto the main window of PDF Extra. Should you come across an encrypted document, the app requires you to enter the correct password, then displays the file's contents.

You can switch from the single page mode, to the continuous, two-page or two-page continuous modes, while also adjusting the zoom level to your preferences.

In addition to opening PDF files, this software solution also make it simple for you to create and embed digital signatures. You can use your mouse to write some text by hand, type it or choose relevant graphics, preview the result, then apply it to your PDF.

You can also overlay freehand drawings, several types of shapes (lines, rectangles, ellipses), along with comment boxes. Multiple stamps are available too, such as Approved, Not Approved, Draft, Final, Completed, Confidential, Not For Public Release and so on.

Adding the current time or a new text field is also easily done using solely your mouse, while taking a snapshot automatically exports the area you selected to your clipboard, so you can paste it in a separate document altogether.

All in all, PDF Extra is a reliable solution not only for enjoying your PDF files within a nice and polished GUI, but also to enhance your documents in several ways. Even though you cannot perform many operations when using the free version,you can still appreciate its responsiveness and ease of use.