diff --git a/README.md b/README.md
index 4645aa3..d7fe2e1 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ to see the exact location) for configuration.
 
 For example, if one wishes to scan receipts always with crop, deskew, unpaper
 post-processing, and making them searchable via OCR, a `receipt` option group
-can be created by writing the following to a file named `recept` in the
+can be created by writing the following to a file named `receipt` in the
 config directory:
 
 ```
@@ -136,7 +136,13 @@ SEARCHABLE=1
 ```
 
 Command-line arguments will overwride settings in the default and named
-configurations.
+configurations. All command line flags support prefixing with `no-` in order to
+override configuration settings. For example, to scan receipts using the option
+group above, but without making it searchable, you would do:
+
+```
+--option-group receipt --no-searchable
+```
 
 ### Tips
 
diff --git a/scan b/scan
index 9d32a08..27962c8 100755
--- a/scan
+++ b/scan
@@ -83,16 +83,24 @@ while [[ $# > 0 ]]; do
 
   -v|--verbose) VERBOSE=1 ;;
 
+  --no-verbose) VERBOSE=0 ;;
+
   -d|--duplex) DUPLEX=1 ;;
 
+  -d|--no-duplex) DUPLEX=0 ;;
+
   -m|--mode) shift; MODE=$1; MODE_CHANGED=1 ;;
 
   --mode-hw-default) MODE_HW_DEFAULT=1 ;;
 
+  --no-mode-hw-default) MODE_HW_DEFAULT=0 ;;
+
   -r|--resolution) shift; RESOLUTION=$1 ;;
 
   -a|--append) APPEND=1 ;;
 
+  --no-append) APPEND=0 ;;
+
   -e|--max) shift; MAXPAGE=$1 ;;
 
   -t|--truncate) shift; TRUNCPAGE=$1 ;;
@@ -110,16 +118,26 @@ while [[ $# > 0 ]]; do
 
   --crop) CROP=1 ;;
 
+  --no-crop) CROP=0 ;;
+
   --deskew) DESKEW=1 ;;
 
+  --no-deskew) DESKEW=0 ;;
+
   --unpaper) UNPAPER=1 ;;
 
+  --no-unpaper) UNPAPER=0 ;;
+
   --searchable|--ocr) SEARCHABLE=1 ;;
 
+  --no-searchable|--no-ocr) SEARCHABLE=0 ;;
+
   --language) shift; LANGUAGE=$1 ;;
 
   --skip-empty-pages) SKIP_EMPTY_PAGES=1 ;;
 
+  --no-skip-empty-pages) SKIP_EMPTY_PAGES=0 ;;
+
   --white-threshold) shift; WHITE_THRESHOLD=$1 ;;
 
   -o|--output) shift; USEOUTPUT=1; OUTPUT="$1" ;;
@@ -134,6 +152,8 @@ while [[ $# > 0 ]]; do
 
   --open) OPENSCAN=1 ;;
 
+  --no-open) OPENSCAN=0 ;;
+
   # ignore, already handled
   -og|--option-group) shift ;;