diff --git a/readme.md b/readme.md
index a76571d..db2f4bb 100644
--- a/readme.md
+++ b/readme.md
@@ -107,3 +107,34 @@ For example, if `"ignore_case" : true` the following 2 lines will be counted as
 1: <SomeTag></sOMeTag>
 2: <sometag></someTag>
 ```
+
+
+### Min Line Length  
+`Default: 4`
+
+Lines with fewer characters than specified in this setting, will be ignored for all functions. Setting this to 1 will cause all non empty lines to be possible duplicates.
+
+For example, by default, only lines 7 and 8 will be selected when using the "select duplicate" command.  
+``` html
+1: 1
+2: 1
+3: 12
+4: 12
+5: 123
+6: 123
+7: 1234
+8: 1234
+```
+
+
+If this setting is set to 2, all the lines except lines 1 and 2 will be selected when using the "select duplicate" command.  
+``` html
+1: 1
+2: 1
+3: 12
+4: 12
+5: 123
+6: 123
+7: 1234
+8: 1234
+```