diff --git a/README.md b/README.md
index 95ce80c..cbad248 100644
--- a/README.md
+++ b/README.md
@@ -98,14 +98,14 @@ Copy gztool.c to the directory where you compiled zlib, and do:
 Usage
 =====
 
-      gztool (v1.3)
+      gztool (v1.4)
       GZIP files indexer, compressor and data retriever.
       Create small indexes for gzipped files and use them
       for quick and random-positioned data extraction.
       No more waiting when the end of a 10 GiB gzip is needed!
       //github.com/circulosmeos/gztool (by Roberto S. Galende)
 
-      $ gztool [-[abLnsv] #] [-[1..9]cCdDeEfFhilpPrRStTwWxXz|u[cCdD]] [-I <INDEX>] <FILE>...
+      $ gztool [-[abLnsv] #] [-[1..9]AcCdDeEfFhilpPrRStTwWxXz|u[cCdD]] [-I <INDEX>] <FILE>...
 
       Note that actions `-bcStT` proceed to an index file creation (if
       none exists) INTERLEAVED with data flow. As data flow and
@@ -117,6 +117,8 @@ Usage
      -[1..9]: Factor of compression to use with `-[c|u[cC]]`, from
          best speed (`-1`) to best compression (`-9`). Default is `-6`.
      -a #: Await # seconds between reads when `-[ST]|Ec`. Default is 4 s.
+     -A: Modifier for `-[rR]` to indicate the range of bytes/lines in
+         absolute values, instead of the default incremental values.
      -b #: extract data from indicated uncompressed byte position of
          gzip file (creating or reusing an index file) to STDOUT.
          Accepts '0', '0x', and suffixes 'kmgtpe' (^10) 'KMGTPE' (^2).
@@ -428,7 +430,7 @@ Other interesting links
 Version
 =======
 
-This version is **v1.3**.
+This version is **v1.4**.
 
 Please, read the *Disclaimer*. In case of any errors, please open an [issue](https://github.com/circulosmeos/gztool/issues).
 
diff --git a/configure.ac b/configure.ac
index 22491c6..16d0ac9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([gztool], [1.3], [roberto.s.galende@gmail.com])
+AC_INIT([gztool], [1.4], [roberto.s.galende@gmail.com])
 AM_INIT_AUTOMAKE([-Wall -Werror foreign])
 AC_PROG_CC
 AC_PROG_CC_C99
diff --git a/gztool.1 b/gztool.1
index 990af92..da645fb 100644
--- a/gztool.1
+++ b/gztool.1
@@ -4,7 +4,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH gztool 1 "Jul 07 2021" "gztool v1.3"
+.TH gztool 1 "Jul 08 2021" "gztool v1.4"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -21,7 +21,7 @@
 gztool \- extract random-positioned data from gzip files, even like `tail -f`
 .SH SYNOPSIS
 .B gztool
-.RI \ [\ [-[abLnsv]\ #]\ [-[1..9]cCdDeEfFhilpPrRStTwWxXz|u[cCdD]]\ [-I\ <INDEX>]\ ]\ "files"\ ...
+.RI \ [\ [-[abLnsv]\ #]\ [-[1..9]AcCdDeEfFhilpPrRStTwWxXz|u[cCdD]]\ [-I\ <INDEX>]\ ]\ "files"\ ...
 .br
 
 Note that actions `-bcStT` proceed to an index file creation (if
@@ -63,6 +63,9 @@ compression factor to use with `-[c|u[cC]]`, from best speed (`-1`) to best comp
 .BR \-a\ #
 Await # seconds between reads when `-[ST]|Ec`. Default is 4 s.
 .TP
+.BR \-A
+modifier for `-[rR]` to indicate the range of bytes/lines in absolute values, instead of the default incremental values.
+.TP
 .BR \-b\ #
 extract data from indicated uncompressed byte position of
 gzip file (creating or reusing an index file) to STDOUT.