Preferences Dialog

Viewers tab

When you select a file to be viewed the list of viewers is searched from top to bottom, the first viewer who's filter matches the file name will be used to view the file.

You can use a '*' filter to send all types of files to a particular viewer, however this should be the last item on the viewer list!

Options
  - Filter : for example '*.txt/*.html' (without the quotes).
  - Action : the action to take for files that match the filter.
  - Program : the program to be used to view the files.

Saving tab

Zip compression level : '0' is for no compression, '9' is for maximum compression. The higher the compression level, the longer it takes to compress or decompress an archive. However I have not noticed any real difference, so the recommended level is '9'.

GZip compression level : Same as for zip. Recommended level is '9'

BZip2 compression buffer : in multiples of 100k. There is no noticeable effect on speed and 900k gives the best compression. Recommended size is 900k.

Force zero compression for solid archives : When saving a zip.gzip or zip.bzip2 file automatically set the zip compression to zero. This creates a solid zip archive with better compression.

Encoding tab

File names, file paths and comments are stored in the archive using an encoding scheme.

All of these encoding schemes use the same encoding for the ASCII character set, so if your file names, paths and comments use only english characters then it doesn't matter which encoding is used.

However for non-english characters it is important.

zip archives appear to use CP850 although the Info-zip sources also mention ISO 8859-1.

tar archives - gnutar seems to use ISO 8859-1 (I haven't seen the specification).

jar archives should use modified UTF-8, however I suspect that many are generated by standard zip archives in which case see the zip note above.

gzip archives should only use ISO 8859-1.