how to open password protected pdf

|Header |Body |Cross-Reference Table |Trailer PDF File Header Irrespective of the PDF version, a PDF file starts with a header containing unique identifier for PDF and the version of the format such as %PDF-1

Use 2D Graphics Acceleration (Windows only): (Appears only if your computer hardware supports 2D graphics acceleration) Speeds up zooming, scrolling, and redrawing of page content, and speeds the rendering and manipulation of 2D PDF content

This option is selected by defaultNote: If this option isn't available in the Page Display preferences, you may have to update your GPU card driver to enable this hardware featureContact your card vendor or computer manufacturer for an updated driver

Page Content And Information Show Large Images: Displays large imagesIf your system is slow to display image-intensive pages, deselect this option

Use Smooth Zooming (Windows only): When deselected, turns off animation effects, which improves performance

Show Art, Trim, & Bleed Boxes: Displays any art, trim, or bleed boxes defined for a documentThe play area typically appears on the PDF page as an image or a rectangle, but can also be invisible

Acrobat and Reader also let you play legacy multimedia files created using an earlier version of AcrobatThese include QuickTime, MPEG, ASF, RAM, and Windows® Media files

However, Acrobat and Reader X do not provide a way to create legacy multimedia filesNote: To help protect your computer from viruses, Acrobat asks you if you want to play multimedia files from unverified sources