diff --git a/docs/source/guides/admin-guides/references/man1/rflash.1.rst b/docs/source/guides/admin-guides/references/man1/rflash.1.rst
index 84d176e49..dbece0af2 100644
--- a/docs/source/guides/admin-guides/references/man1/rflash.1.rst
+++ b/docs/source/guides/admin-guides/references/man1/rflash.1.rst
@@ -57,7 +57,11 @@ OpenPOWER OpenBMC specific :
 ============================
 
 
-\ **rflash**\  \ *noderange*\  [\ *tar_file_path*\  | \ *image_id*\ ] [\ **-c | -**\ **-check**\ ] [\ **-a | -**\ **-activate**\ ] [\ **-l | -**\ **-list**\ ] [\ **-u | -**\ **-upload**\ ] [\ **-d | -**\ **-delete**\ ]
+\ **rflash**\  \ *noderange*\  {[\ **-c | -**\ **-check**\ ] | [\ **-l | -**\ **-list**\ ]}
+
+\ **rflash**\  \ *noderange*\  \ *tar_file_path*\  {[\ **-c | -**\ **-check**\ ] | [\ **-u | -**\ **-upload**\ ]}
+
+\ **rflash**\  \ *noderange*\  \ *image_id*\  {[\ **-a | -**\ **-activate**\ ] | [\ **-d | -**\ **-delete**\ ]}
 
 
 
diff --git a/perl-xCAT/xCAT/Usage.pm b/perl-xCAT/xCAT/Usage.pm
index b0c78d73b..b41fa6ab9 100755
--- a/perl-xCAT/xCAT/Usage.pm
+++ b/perl-xCAT/xCAT/Usage.pm
@@ -345,7 +345,9 @@ my %usage = (
     OpenPOWER BMC specific (using IPMI):
         rflash <noderange> [<hpm_file_path>|-d=<data_directory>] [-c|--check] [--retry=<count>] [-V]
     OpenPOWER OpenBMC specific:
-        rflash <noderange> [<tar_file_path>|<image_id>] [-c|--check] [-a|--activate] [-l|--list] [-u|--upload] [-d|--delete]",
+        rflash <noderange> {[-c|--check] | [-l|--list]}
+        rflash <noderange> <tar_file_path> {[-c|--check] | [-u|--upload]}
+        rflash <noderange> <image_id> {[-a|--activate] | [-d|--delete]}",
     "mkhwconn" =>
       "Usage:
     mkhwconn [-h|--help]
diff --git a/xCAT-client/pods/man1/rflash.1.pod b/xCAT-client/pods/man1/rflash.1.pod
index 70c964d15..ac2de5adc 100644
--- a/xCAT-client/pods/man1/rflash.1.pod
+++ b/xCAT-client/pods/man1/rflash.1.pod
@@ -28,7 +28,11 @@ B<rflash> I<noderange> [I<hpm_file_path> | B<-d=>I<data_directory>] [B<-c>|B<--c
 
 =head2 OpenPOWER OpenBMC specific :
 
-B<rflash> I<noderange> [I<tar_file_path> | I<image_id>] [B<-c>|B<--check>] [B<-a>|B<--activate>] [B<-l>|B<--list>] [B<-u>|B<--upload>] [B<-d>|B<--delete>]
+B<rflash> I<noderange> {[B<-c>|B<--check>] | [B<-l>|B<--list>]}
+
+B<rflash> I<noderange> I<tar_file_path> {[B<-c>|B<--check>] | [B<-u>|B<--upload>]}
+
+B<rflash> I<noderange> I<image_id> {[B<-a>|B<--activate>] | [B<-d>|B<--delete>]}
 
 =head1 B<Description>