diff --git a/cmd/help.go b/cmd/help.go
index 36fd26eef..53e3d15f4 100644
--- a/cmd/help.go
+++ b/cmd/help.go
@@ -70,17 +70,22 @@ var helpFlags = &cobra.Command{
 	Short: "Show the global flags for rclone",
 	Run: func(command *cobra.Command, args []string) {
 		command.Flags()
-		if len(args) > 0 {
-			re, err := filter.GlobStringToRegexp(args[0], false)
-			if err != nil {
-				log.Fatalf("Invalid flag filter: %v", err)
-			}
-			fs.Debugf(nil, "Flag filter: %s", re.String())
-			filterFlagsRe = re
-		}
 		if GeneratingDocs {
 			Root.SetUsageTemplate(docFlagsTemplate)
 		} else {
+			if len(args) > 0 {
+				re, err := filter.GlobStringToRegexp(args[0], false)
+				if err != nil {
+					log.Fatalf("Invalid flag filter: %v", err)
+				}
+				fs.Debugf(nil, "Flag filter: %s", re.String())
+				filterFlagsRe = re
+			}
+			if filterFlagsGroup != "" {
+				Root.SetUsageTemplate(filterFlagsSingleGroupTemplate)
+			} else if len(args) > 0 {
+				Root.SetUsageTemplate(filterFlagsMultiGroupTemplate)
+			}
 			Root.SetOutput(os.Stdout)
 		}
 		_ = command.Usage()
@@ -152,7 +157,7 @@ func setupRootCommand(rootCmd *cobra.Command) {
 	})
 	cobra.AddTemplateFunc("flagGroups", func(cmd *cobra.Command) []*flags.Group {
 		// Add the backend flags and check all flags
-		backendGroup := flags.All.NewGroup("Backend", "Backend only flags. These can be set in the config file also.")
+		backendGroup := flags.All.NewGroup("Backend", "Backend-only flags (these can be set in the config file also)")
 		allRegistered := flags.All.AllRegistered()
 		cmd.InheritedFlags().VisitAll(func(flag *pflag.Flag) {
 			if _, ok := backendFlags[flag.Name]; ok {
@@ -210,20 +215,16 @@ Aliases:
 Examples:
 {{.Example}}{{end}}{{if and (showCommands .) .HasAvailableSubCommands}}
 
-Available Commands:{{range .Commands}}{{if (or .IsAvailableCommand (eq .Name "help"))}}
+Available commands:{{range .Commands}}{{if (or .IsAvailableCommand (eq .Name "help"))}}
   {{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{if and (showLocalFlags .) .HasAvailableLocalFlags}}
 
 Flags:
 {{.LocalFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if and (showGlobalFlags .) .HasAvailableInheritedFlags}}
 
-{{ range flagGroups . }}{{ if .Flags.HasFlags }}
-# {{ .Name }} Flags
-
-{{ .Help }}
-
+{{ range flagGroups . }}{{ if .Flags.HasFlags }}{{ .Help }} (flag group {{ .Name }}):
 {{ .Flags.FlagUsages | trimTrailingWhitespaces}}
-{{ end }}{{ end }}
 
+{{ end }}{{ end }}
 Additional help topics:{{range .Commands}}{{if .IsAdditionalHelpTopicCommand}}
   {{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}
 
@@ -232,6 +233,15 @@ Use "rclone help flags" for to see the global flags.
 Use "rclone help backends" for a list of supported services.
 `
 
+var filterFlagsSingleGroupTemplate = `{{ range flagGroups . }}{{ if .Flags.HasFlags }}{{ .Flags.FlagUsages | trimTrailingWhitespaces}}
+{{ end }}{{ end }}
+`
+
+var filterFlagsMultiGroupTemplate = `{{ range flagGroups . }}{{ if .Flags.HasFlags }}{{ .Help }} (flag group {{ .Name }}):
+{{ .Flags.FlagUsages | trimTrailingWhitespaces}}
+
+{{ end }}{{ end }}`
+
 var docFlagsTemplate = `---
 title: "Global Flags"
 description: "Rclone Global Flags"
@@ -245,7 +255,7 @@ split into groups.
 {{ range flagGroups . }}{{ if .Flags.HasFlags }}
 ## {{ .Name }}
 
-{{ .Help }}
+{{ .Help }}.
 
 ` + "```" + `
 {{ .Flags.FlagUsages | trimTrailingWhitespaces}}
diff --git a/fs/config.go b/fs/config.go
index bd3d7aa89..caf242fdf 100644
--- a/fs/config.go
+++ b/fs/config.go
@@ -70,7 +70,7 @@ var ConfigOptionsInfo = Options{{
 	Name:     "checksum",
 	ShortOpt: "c",
 	Default:  false,
-	Help:     "Check for changes with size & checksum (if available, or fallback to size only).",
+	Help:     "Check for changes with size & checksum (if available, or fallback to size only)",
 	Groups:   "Copy",
 }, {
 	Name:    "size_only",
diff --git a/fs/config/flags/flags.go b/fs/config/flags/flags.go
index 10b1fd77f..db76f5d71 100644
--- a/fs/config/flags/flags.go
+++ b/fs/config/flags/flags.go
@@ -111,19 +111,19 @@ var All *Groups
 // Groups of flags for documentation purposes
 func init() {
 	All = NewGroups()
-	All.NewGroup("Copy", "Flags for anything which can Copy a file.")
-	All.NewGroup("Sync", "Flags just used for `rclone sync`.")
-	All.NewGroup("Important", "Important flags useful for most commands.")
-	All.NewGroup("Check", "Flags used for `rclone check`.")
-	All.NewGroup("Networking", "General networking and HTTP stuff.")
-	All.NewGroup("Performance", "Flags helpful for increasing performance.")
-	All.NewGroup("Config", "General configuration of rclone.")
-	All.NewGroup("Debugging", "Flags for developers.")
-	All.NewGroup("Filter", "Flags for filtering directory listings.")
-	All.NewGroup("Listing", "Flags for listing directories.")
-	All.NewGroup("Logging", "Logging and statistics.")
-	All.NewGroup("Metadata", "Flags to control metadata.")
-	All.NewGroup("RC", "Flags to control the Remote Control API.")
+	All.NewGroup("Copy", "Flags for anything which can copy a file")
+	All.NewGroup("Sync", "Flags used for sync commands")
+	All.NewGroup("Important", "Important flags useful for most commands")
+	All.NewGroup("Check", "Flags used for check commands")
+	All.NewGroup("Networking", "Flags for general networking and HTTP stuff")
+	All.NewGroup("Performance", "Flags helpful for increasing performance")
+	All.NewGroup("Config", "Flags for general configuration of rclone")
+	All.NewGroup("Debugging", "Flags for developers")
+	All.NewGroup("Filter", "Flags for filtering directory listings")
+	All.NewGroup("Listing", "Flags for listing directories")
+	All.NewGroup("Logging", "Flags for logging and statistics")
+	All.NewGroup("Metadata", "Flags to control metadata")
+	All.NewGroup("RC", "Flags to control the Remote Control API")
 }
 
 // installFlag constructs a name from the flag passed in and