Option M -- File Mode.  FILT has four file modes: "Source Code" for 
assembler source code; "ASCII Text" for ordinary ASCII text files; 
"WordStar W" for WordStar document files (removes dot commands); and 
"WordStar D" for WordStar document files (retains dot commands).  Any of 
these modes can be made the default.  See the accompanying documentation 
for details on the differences between these modes.  Whatever mode is 
chosen as the default can be changed with the "S", "A", "W", or "D" command 
line options.

Option T -- Tab Option.  Tabs are always expanded to spaces, but then the 
file can be retabbed or not as the default.  The chosen default can be 
toggled with the "T" command line option.

Option Q -- Quiet Mode.  This option determines whether FILT will be in 
verbose or quiet mode by default (except that FILT always defaults to quiet 
mode if the ZCPR3 quiet flag is set).  The default may be toggled with the 
command line "Q" option.

Option P -- Progress Reports.  Normally FILT displays a running line count 
while it is working.  This report can be suppressed by selecting "NO".