diff --git a/doc/lrzip.conf.example b/doc/lrzip.conf.example
index 9d0e814..3edee3a 100644
--- a/doc/lrzip.conf.example
+++ b/doc/lrzip.conf.example
@@ -1,55 +1,47 @@
 # lrzip.conf example file
 # anything beginning with a # or whitespace will be ignored
 # valid parameters are separated with an = and a value
-# parameters and values are not case sensitive
+# parameters and values are not case sensitive except where specified
 # 
 # lrzip 0.24+, peter hyman, pete@peterhyman.com
 # ignored by earlier versions.
 
-# Compression Window size in 100MB. Normally selected by program.
+# Compression Window size in 100MB. Normally selected by program. (-w)
 # WINDOW = 20
-
-# Compression Level 1-9 (7 Default).
+# Compression Level 1-9 (7 Default). (-L)
 # COMPRESSIONLEVEL = 7
-
 # Use -U setting, Unlimited ram. Yes or No
 # UNLIMITED = NO
-
-# Compression Method, rzip, gzip, bzip2, lzo, or lzma (default), or zpaq.
+# Compression Method, rzip, gzip, bzip2, lzo, or lzma (default), or zpaq. (-n -g -b -l --lzma -z)
 # If specified here, command line options not usable.
 # COMPRESSIONMETHOD = lzma
-
-# Perform LZO Test. Default = YES (-T option, NO)
+# Perform LZO Test. Default = YES (-T )
 # LZOTEST = NO
-
-# Hash Check on decompression, YES
+# Hash Check on decompression, (-c)
 # HASHCHECK = YES
-
-# Show HASH value on Compression even if Verbose is off, YES
+# Show HASH value on Compression even if Verbose is off, YES (-H)
 # SHOWHASH = YES
 
-# Default output directory
+# Default output directory (-O)
 # OUTPUTDIRECTORY = location
-
-# Verbosity, Yes or Max
+# Verbosity, YES or MAX (v, vv)
 # VERBOSITY = max
+# Show Progress as file is parsed, YES or no (NO = -q option)
+# SHOWPROGRESS = YES
 
-# Show Progress as file is parsed, Yes or no
-# SHOWPROGRESS = true
-
-# Set Niceness. 19 is default. -20 to 19 is the allowable range
+# Set Niceness. 19 is default. -20 to 19 is the allowable range (-N)
 # NICE = 19
 
-# Keep broken or damaged output files, YES
+# Keep broken or damaged output files, YES (-K)
 # KEEPBROKEN = YES
 
-# Delete source file after compression
+# Delete source file after compression (-D)
 # this parameter and value are case sensitive
 # value must be YES to activate
 
 # DELETEFILES = NO
 
-# Replace existing lrzip file when compressing
+# Replace existing lrzip file when compressing (-f)
 # this parameter and value are case sensitive
 # value must be YES to activate
 
@@ -58,6 +50,6 @@
 # Override for Temporary Directory. Only valid when stdin/out or Test is used
 # TMPDIR = /tmp
 
+# Whether to use encryption on compression YES, NO (-e)
 # ENCRYPT = NO
 
-# Whether to use encryption on compression
\ No newline at end of file
diff --git a/main.c b/main.c
index 6466df4..f3391a8 100644
--- a/main.c
+++ b/main.c
@@ -308,6 +308,7 @@ static const char *coptions = "bcCdefghHikKlLnN:o:O:p:PrS:tTUm:vVw:z?123456789";
 int main(int argc, char *argv[])
 {
 	bool lrzcat = false, compat = false, recurse = false;
+	bool options_file = false; /* for environment and tracking of compression setting */
 	struct timeval start_time, end_time;
 	struct sigaction handler;
 	double seconds,total_time; // for timers
@@ -342,19 +343,44 @@ int main(int argc, char *argv[])
 	/* Get Preloaded Defaults from lrzip.conf
 	 * Look in ., $HOME/.lrzip/, /etc/lrzip.
 	 * If LRZIP=NOCONFIG is set, then ignore config
+	 * If lrzip.conf sets a compression mode, options_file will be true.
+	 * This will allow for a test to permit an override of compression mode.
+	 * If there is an override, then all compression settings will be reset
+	 * and command line switches will prevail, including for --lzma.
 	 */
 	eptr = getenv("LRZIP");
 	if (eptr == NULL)
-		read_config(control);
+		options_file = read_config(control);
 	else if (!strstr(eptr,"NOCONFIG"))
-		read_config(control);
+		options_file = read_config(control);
+	if (options_file)
+		if (control->flags & FLAG_NOT_LZMA)				/* if compression set in conf file */
+			control->flags &= ~FLAG_NOT_LZMA;			/* clear compression flags (LZMA now default) */
+
 
 	while ((c = getopt_long(argc, argv, compat ? coptions : loptions, long_options, &i)) != -1) {
 		switch (c) {
 		case 'b':
+		case 'g':
+		case 'l':
+		case 'n':
+		case 'z':
 			if (control->flags & FLAG_NOT_LZMA)
 				failure("Can only use one of -l, -b, -g, -z or -n\n");
-			control->flags |= FLAG_BZIP2_COMPRESS;
+			/* Select Compression Mode */
+			if (c == 'b')
+				control->flags |= FLAG_BZIP2_COMPRESS;
+			else if (c == 'g')
+				control->flags |= FLAG_ZLIB_COMPRESS;
+			else if (c == 'l')
+				control->flags |= FLAG_LZO_COMPRESS;
+			else if (c == 'n')
+				control->flags |= FLAG_NO_COMPRESS;
+			else if (c == 'z')
+				control->flags |= FLAG_ZPAQ_COMPRESS;
+			break;
+		case '/':							/* LZMA Compress selected */
+			control->flags &= ~FLAG_NOT_LZMA;			/* clear alternate compression flags */
 			break;
 		case 'c':
 			if (compat) {
@@ -380,11 +406,6 @@ int main(int argc, char *argv[])
 		case 'f':
 			control->flags |= FLAG_FORCE_REPLACE;
 			break;
-		case 'g':
-			if (control->flags & FLAG_NOT_LZMA)
-				failure("Can only use one of -l, -b, -g, -z or -n\n");
-			control->flags |= FLAG_ZLIB_COMPRESS;
-			break;
 		case 'h':
 		case '?':
 			usage(compat);
@@ -405,11 +426,6 @@ int main(int argc, char *argv[])
 		case 'K':
 			control->flags |= FLAG_KEEP_BROKEN;
 			break;
-		case 'l':
-			if (control->flags & FLAG_NOT_LZMA)
-				failure("Can only use one of -l, -b, -g, -z or -n\n");
-			control->flags |= FLAG_LZO_COMPRESS;
-			break;
 		case 'L':
 			if (compat) {
 				license();
@@ -422,11 +438,6 @@ int main(int argc, char *argv[])
 		case 'm':
 			control->ramsize = atol(optarg) * 1024 * 1024 * 100;
 			break;
-		case 'n':
-			if (control->flags & FLAG_NOT_LZMA)
-				failure("Can only use one of -l, -b, -g, -z or -n\n");
-			control->flags |= FLAG_NO_COMPRESS;
-			break;
 		case 'N':
 			control->nice_val = atoi(optarg);
 			if (control->nice_val < -20 || control->nice_val > 19)
@@ -508,11 +519,6 @@ int main(int argc, char *argv[])
 			if (control->window < 1)
 				failure("Window must be positive\n");
 			break;
-		case 'z':
-			if (control->flags & FLAG_NOT_LZMA)
-				failure("Can only use one of -l, -b, -g, -z or -n\n");
-			control->flags |= FLAG_ZPAQ_COMPRESS;
-			break;
 		case '1':
 		case '2':
 		case '3':
diff --git a/man/lrzip.conf.5 b/man/lrzip.conf.5
index 244a317..f8cfa4f 100644
--- a/man/lrzip.conf.5
+++ b/man/lrzip.conf.5
@@ -1,4 +1,4 @@
-.TH "lrzip.conf" "5" "January 2009" "" ""
+.TH "lrzip.conf" "5" "January 2009, updated May 2019" "" ""
 .SH "NAME"
 lrzip.conf \- Configuration File for lrzip
 .SH "DESCRIPTION"
@@ -13,54 +13,63 @@ three places\&:
 .nf
 $PWD \- Current Directory
 /etc/lrzip
-$HOME/\&./lrzip
+$HOME/\&.lrzip
 .PP
 Parameters are set in \fBPARAMETER\&=VALUE\fP fashion where any line
 beginning with a \fB#\fP or that is blank will be ignored\&.
-Parameter values are not case sensitive\&.
+Parameter values are not case sensitive except where specified\&.
 .PP
 .SH "CONFIG FILE EXAMPLE"
 .nf
 # This is a comment.
 
-# Compression Window size in 100MB. Normally selected by program.
-# WINDOW = 5
-# Compression Level 1-9 (7 Default).
+# Compression Window size in 100MB. Normally selected by program. (-w)
+# WINDOW = 20
+# Compression Level 1-9 (7 Default). (-L)
 # COMPRESSIONLEVEL = 7
-# Unlimited Ram Compression
-# UNLIMITED = YES
-# Compression Method, rzip, gzip, bzip2, lzo, or lzma (default), zpaq.
-# COMPRESSIONMETHOD = LZMA
-# Perform LZO Test. Default = YES (\-T option, NO)
+# Use -U setting, Unlimited ram. Yes or No
+# UNLIMITED = NO
+# Compression Method, rzip, gzip, bzip2, lzo, or lzma (default), or zpaq. (-n -g -b -l --lzma -z)
+# If specified here, command line options not usable.
+# COMPRESSIONMETHOD = lzma
+# Perform LZO Test. Default = YES (-T )
 # LZOTEST = NO
-# Hash Check on decompression, YES
+# Hash Check on decompression, (-c)
 # HASHCHECK = YES
-# Show HASH value on Compression even if Verbose is off, YES
+# Show HASH value on Compression even if Verbose is off, YES (-H)
 # SHOWHASH = YES
 
-# Default output directory
+# Default output directory (-O)
 # OUTPUTDIRECTORY = location
-# Verbosity, Yes or Max
-# VERBOSITY = MAX
-# Show Progress as file is parsed, YES, NO (yes is default)
-# SHOWPROGRESS = NO
-# Set Niceness. 19 is default. \-20 to 19 is the allowable range
+# Verbosity, YES or MAX (v, vv)
+# VERBOSITY = max
+# Show Progress as file is parsed, YES or no (NO = -q option)
+# SHOWPROGRESS = YES
+
+# Set Niceness. 19 is default. -20 to 19 is the allowable range (-N)
 # NICE = 19
 
-# Keep broken or damaged output files, YES
+# Keep broken or damaged output files, YES (-K)
 # KEEPBROKEN = YES
-# Delete source file after compression
+
+# Delete source file after compression (-D)
 # this parameter and value are case sensitive
 # value must be YES to activate
+
 # DELETEFILES = NO
 
-# Replace existing lrzip file when compressing
+# Replace existing lrzip file when compressing (-f)
 # this parameter and value are case sensitive
 # value must be YES to activate
-# REPLACEFILE = NO
 
-# Select Temporary Directory when stdin/stdout or Test file is used
+# REPLACEFILE = YES 
+
+# Override for Temporary Directory. Only valid when stdin/out or Test is used
 # TMPDIR = /tmp
+
+# Whether to use encryption on compression YES, NO (-e)
+# ENCRYPT = NO
+
 .fi
 .PP
 .SH "NOTES"
diff --git a/util.c b/util.c
index d79125b..a40de7f 100644
--- a/util.c
+++ b/util.c
@@ -205,7 +205,7 @@ bool read_config(rzip_control *control)
 			fprintf(control->msgout, "Using configuration file /etc/lrzip/lrzip.conf\n");
 	}
 	if (fp == NULL)
-		return true;
+		return false;
 
 	/* if we get here, we have a file. read until no more. */