Zip File Options
Support for Zip files is built-in to Opus, and so options affecting Zip files
are found on this page rather than on the Archive Plugins page.
- Enable internal Opus Zip support: Turn this on to enable
Zip file support in Opus. If this is turned off then the built-in Zip support
is disabled completely; Opus would not be able to handle Zip files unless a
third-party plugin were installed to do so.
- Make Opus the system default handler for Zip files: If
this is turned on then Opus will register itself as the default handler for
.zip files. Double-clicking a Zip file in Explorer or other
program will cause an Opus Lister to open showing the contents of the archive.
- Ask for encryption/compression settings when copying into Zip
files: If this is turned on and you copy files to an existing Zip
archive, Opus will prompt you for encryption and compression settings on the
fly.
- Open Zip files as read-only by default: If this is turned
on, when you navigate to an existing Zip file it will automatically be
treated as read-only by Opus. You will not be able to make changes to the
contents of the Zip file without turning off read-only mode.
- Use temporary file when copying to Zip files: If this is
turned on and you add files to an existing Zip archive, Opus makes a temporary
copy of the Zip file before modifying it. This is safer as if something goes
wrong (power failure, etc) the contents of the original Zip file will be
unaffected. However it can slow down the process of adding files to archives.
- Set archive date to date of newest file within it: If
this is turned on, the "last modified" timestamp of the Zip archive will be
automatically set to the time of the newest (most recent) file within the
archive. The timestamp is updated whenever files are added to or removed from
the archive.
- Compression level: This lets you set the default
compression level when adding files to Zip files. If you are using the Add to Archive dialog you
can override this at the time. There are six compression levels available,
ranging from Store (which does no compression at all and so is the
fastest) to Best (which produces the highest level of compression but
takes longer to archive).
- Enhanced compression level: This activates an enhanced compression algorithm that may not be backwards
compatible with some Zip tools - if you are sending Zip files to other
people you should make sure they can decompress such archives.
- Zip Extensions: This lets you specify the file extensions
that Opus will treat as Zip files. Many common file formats are actually Zip
files "in disguise", for example .jar files are readable with Zip
tools.
This is specified as a
semicolon-separated list of file extensions.
- Hide from Tree: This option is used to specify which file
extensions (from the Zip Extensions list) are not to be displayed in the tree.
If you turn on the option in Folder Tree / Contents to display archives in the
tree, this lets you stop certain Zip formats from appearing there. For
example, .exe files can be treated as Zip files if they are
self-extracting archives, but you probably don't want every
.exe file on your machine appearing in the folder tree.
- Packed column: When you are viewing the contents of a Zip
file in a file display you can add several Zip-specific columns to the file
display, including the Packed column. This column displays
the compressed or "packed" size of files within the archive. You can use this
option to change the units the Packed column displays file
sizes in (bytes, KB or auto - which means Opus
chooses the most appropriate unit automatically).