Preferred Stream Selection
Zoom Player has the ability to automatically select Audio and Subtitle streams in media files according to user specified input. For each stream type (audio/subtitles) you can specify a preferred Language Country ID, a text match or a stream number. Zoom Player will first try to match the Country ID, failing that a text match and failing that, setting a specific stream number.

You can specify multiple text matches by separating each text string with the ";" character, for example "japan;english", the matches are tested in order, first match is applied.

On CD / DVD Insert
On CD / DVD Insert controls what action Zoom Player should take when it detects an inserted CD or DVD.

On Play Complete
On play complete controls what action Zoom Player should perform once the entire playlist has been played through.

Auto-Play media file when opened
Automatically start playing media files as they are opened.

Auto-Play the next file in the playlist (otherwise pause at end of file)
Under certain conditions, you may want Zoom Player to pause at the end of each media file (slideshow presentations for example).

When playing the next file in the same directory, repeat when all files have been played
Zoom Player is capable of playing the files within a directory as if they were a playlist. By enabling this setting, Zoom Player will play the content of a directory in a loop.

Save Associated Media definition file in local Media-Data directory (instead of file directory)
Zoom Player's Definition files by default are saved within the same directory as the playing media file (unless it's on a read-only media). By enabling this setting, media definition files are always saved in a local Zoom Player directory.

Auto-Save Associated Media definition file
When enabled, Zoom Player will automatically save a Definition file for each playing media.

Auto-Save Media Chapter files
Zoom Player's chapter files allow you to add chapter points to any media file. By enabling this setting, Zoom Player will automatically save chapter files if you add chapter information to a media file.

Load Associated Media definition file (media mode)
As definition files contain data such as color values, aspect ratio mode and other settings that can change your current Zoom Player configuration, automatic loading is optional.

Load Registry Entries within Media / DVD definition files
As definition files can contain registry information (which can change your system setup), Automatic loading of registry values within definition files is optional.

Load External Audio tracks (media mode)
By enabling this setting, Zoom Player will look for audio files with the same base file name as a media file you're currently trying to load in order to mix in a secondary audio track. For example:
myvideo.avi
myvideo.mp3

Load Matroska XML Media Chapter files (".mtxchp" extension)
Zoom Player supports multiple chaptering formats. By enabling this setting, Zoom Player will look for the external Matroska Chapter format files. You don't need to open the chapter file, opening the media file will automatically look for the chapter file. For example:
myvideo.avi
myvideo.mtxchp

Load CUE Media Chapter files (".cue" extension)
Zoom Player supports multiple chaptering formats. By enabling this setting, Zoom Player will look for the external CUE Chapter format files. You don't need to open the chapter file, opening the media file will automatically look for the chapter file. For example:
myvideo.mpg
myvideo.cue

Use internal JPEG / BMP / PNG image decoder (supports higher resolution images)
The DirectShow (microsoft) interface for opening media files can have issues when loading high resolution images (above 2048x2048). Zoom Player's internal image decoder is capable of handling these higher resolution images and as a side benefit, has better transitions when viewing multiple images.

Use QuickTime ActiveX Component to play QuickTime files (otherwise use DirectShow)
There are two ways to play Quicktime (".MOV" files) content. The ActiveX code from Apple and the DirectShow code using open-source decoders. The ActiveX code is a lot slower, has inferior image quality and can be buggy, but it is the only way to play some of the older QuickTime files. All recent QuickTime content can be played through DirectShow and as such, you should probably have this setting disabled unless you must play some older QuickTime content. Click here for more information.

Use Flash ActiveX Component to play ".SWF" Flash files (otherwise use DirectShow)
Currently, the only way to play Flash (".SWF") content is to use the Flash ActiveX component. If at any point in the future, a DirectShow component can achieve similar results, then this setting should be turned off as DirectShow is generally better. At this point in time, you should leave this setting enabled. Please note that this setting only deals with playing ".SWF" flash files and not Flash Video ".FLV" files which can be played very nicely through DirectShow and several open-source decoders.

Play Incomplete AVI Files
When enabled, Zoom Player will try to play AVI files which are not yet complete or even corrupt. Please note that playing incomplete AVI files may not always work.

Always open media files (even if they are in use by a 3rd party program)
When enabled, this setting allows Zoom Player to open files that are locked by third party applications (usually because the file is being downloaded).

Reload & Resume playback at last position if file size changes
With this setting enabled, Zoom Player will check if the file size changed as Zoom Player was playing it and if it has, Zoom Player will load the file and resume playback from the position it was it. This is useful when capturing live video to a media file while viewing it through Zoom Player.

Remember last media position (days)
Zoom Player has the capability to remember the last viewed position in media files so that when you play the file again, it will resume where you left off. This setting is also connected to the Playback History interface (they share the same data).

Don't remember media position for Audio Files
When enabled, Zoom Player will not restore the last saved position when playing audio files.

Image Slideshow (seconds)
When playing media content that has no length/duration such as Images, Zoom Player will set a user specified Slideshow duration for the file. For presentations, you may want to look at the Zoom Player Playlist format as it allows you assign specific durations for each image (or media) file.