In one sentence, describe what the following article is about: The Preferences dialog box is displayed. The Preferences dialog box displays the full screen options. Note: You can browse through a document using mouse or keyboard commands even if the Advance every check box is selected.       The background color is used to color the empty area of the screen, when a page of a document is not large enough to cover the entire screen. The preferences you have specified will apply to all PDF documents that you view in full screen view.
Summary: Click Preferences on the Edit menu. Select Full Screen from the list on the left side of the Preferences dialog box. To automatically advance the document pages, select the Advance every check box and type the time in seconds that each page should be displayed in the seconds text box. To return to the first page after the last page is displayed, select the Loop after last page check box. Select the Escape key exits check box to enable you to exit the full screen view by pressing the Esc (Escape)  key. Select the Left click to go forward one page; right click to go back one page check box to enable you to page through a document by clicking the mouse. Select the Ignore all transitions check box to remove transition effects from presentations that you view in Full Screen view. To specify a default transition effect to display when you page through a document, select a transition effect from the Default transition drop-down list. To specify the behavior of the mouse in full screen view, select an option from the Mouse cursor drop-down list. Select a background color for the screen from the Background color fly-out menu. Click OK to close the Preferences dialog box.

Problem: Article: The most popular and current is Lock Screen OS 9 from AppPro OS Studio. Open the app’s settings, then tap the checkbox next to “Enable Screen”. You can go back to your original lockscreen by unchecking this box later.  Be sure to Disable System Lock before activating the app. Different apps have slightly different steps involved with activation. Be sure to follow each apps instructions, usually listed in the Google Play store page for that app. This allows you to set an iOS-style pin for your phone’s security. From there, you can select from a variety of wallpapers for your iOS 9-themed lock screen.
Summary:
Launch the Play Store. Download and install a Lock Screen app. Activate Lock Screen OS 9. Tap the “Pin Lock” checkbox. Tap “Set Wallpaper”.