diff --git a/indra/newview/rlvdefines.h b/indra/newview/rlvdefines.h
index 4d64cdb25d..a498824c60 100644
--- a/indra/newview/rlvdefines.h
+++ b/indra/newview/rlvdefines.h
@@ -203,6 +203,7 @@ enum ERlvBehaviour {
 	RLV_BHVR_ATTACHALLTHIS,			// "attachallthis"
 	RLV_BHVR_ATTACHALLTHISOVER,		// "attachallthisover"
 	RLV_BHVR_DETACHALLTHIS,			// "detachallthis"
+	RLV_BHVR_ADJUSTHEIGHT,			// "adjustheight"
 	RLV_BHVR_TPTO,					// "tpto"
 	RLV_BHVR_VERSION,				// "version"
 	RLV_BHVR_VERSIONNEW,			// "versionnew"
diff --git a/indra/newview/rlvhandler.cpp b/indra/newview/rlvhandler.cpp
index e4a34bf670..e20c57fe3e 100644
--- a/indra/newview/rlvhandler.cpp
+++ b/indra/newview/rlvhandler.cpp
@@ -1435,6 +1435,18 @@ ERlvCmdRet RlvHandler::processForceCommand(const RlvCommand& rlvCmd) const
 		case RLV_BHVR_SIT:			// @sit:<option>=force
 			eRet = onForceSit(rlvCmd);
 			break;
+		case RLV_BHVR_ADJUSTHEIGHT:	// @adjustheight:<options>=force		- Checked: 2011-03-28 (RLVa-1.3.0f) | Added: RLVa-1.3.0f
+			{
+				RlvCommandOptionAdjustHeight rlvOption(rlvCmd);
+				VERIFY_OPTION( (rlvOption.m_fValid) && (0.0f != rlvOption.m_nPelvisToFootDeltaMult) );
+				if (isAgentAvatarValid())
+				{
+					F32 nValue = (rlvOption.m_nPelvisToFoot - gAgentAvatarp->getPelvisToFoot()) * rlvOption.m_nPelvisToFootDeltaMult;
+					nValue += rlvOption.m_nPelvisToFootOffset;
+					gSavedSettings.setF32(RLV_SETTING_AVATAROFFSET_Z, llclamp<F32>(nValue, -1.0f, 1.0f));
+				}
+			}
+			break;
 		case RLV_BHVR_TPTO:			// @tpto:<option>=force					- Checked: 2010-04-07 (RLVa-1.2.0d) | Modified: RLVa-1.0.0h
 			{
 				eRet = RLV_RET_FAILED_OPTION;
diff --git a/indra/newview/rlvhelper.cpp b/indra/newview/rlvhelper.cpp
index 90f918e1a2..999ea87e99 100644
--- a/indra/newview/rlvhelper.cpp
+++ b/indra/newview/rlvhelper.cpp
@@ -29,6 +29,8 @@
 #include "rlvhandler.h"
 #include "rlvinventory.h"
 
+#include <boost/algorithm/string.hpp>
+
 // ============================================================================
 // RlvCommmand
 //
@@ -157,10 +159,10 @@ void RlvCommand::initLookupTable()
 				"displayname", "edit", "editobj", "rez", "fartouch", "interact", "touchthis", "touchattach", "touchattachself", 
 				"touchattachother", "touchhud", "touchworld", "touchall", "fly", "setgroup", "unsit", "sit", "sittp", "standtp", 
 				"setdebug", "setenv", "detachme", "attachover", "attachthis", "attachthisover", "detachthis", "attachall", 
-				"attachallover", "detachall", "attachallthis", "attachallthisover", "detachallthis", "tpto", "version", "versionnew", 
-				"versionnum", "getattach", "getattachnames", "getaddattachnames", "getremattachnames", "getoutfit", "getoutfitnames", 
-				"getaddoutfitnames", "getremoutfitnames", "findfolder", "findfolders", "getpath", "getpathnew", "getinv", "getinvworn", 
-				"getgroup", "getsitid", "getcommand", "getstatus", "getstatusall"
+				"attachallover", "detachall", "attachallthis", "attachallthisover", "detachallthis", "adjustheight", "tpto", 
+				"version", "versionnew", "versionnum", "getattach", "getattachnames", "getaddattachnames", "getremattachnames", 
+				"getoutfit", "getoutfitnames", "getaddoutfitnames", "getremoutfitnames", "findfolder", "findfolders", 
+				"getpath", "getpathnew", "getinv", "getinvworn", "getgroup", "getsitid", "getcommand", "getstatus", "getstatusall"
 			};
 
 		for (int idxBvhr = 0; idxBvhr < RLV_BHVR_COUNT; idxBvhr++)
@@ -254,6 +256,25 @@ bool RlvCommandOptionGetPath::getItemIDs(LLWearableType::EType wtType, uuid_vec_
 	return (cntItemsPrev != idItems.size());
 }
 
+// Checked: 2011-03-28 (RLVa-1.3.0f) | Added: RLVa-1.3.0f
+RlvCommandOptionAdjustHeight::RlvCommandOptionAdjustHeight(const RlvCommand& rlvCmd)
+	: m_fValid(false), m_nPelvisToFoot(0.0f), m_nPelvisToFootDeltaMult(1.0f), m_nPelvisToFootOffset(0.0f)
+{
+	std::vector<std::string> cmdTokens;
+	boost::split(cmdTokens, rlvCmd.getOption(), boost::is_any_of(";"));
+	if (1 == cmdTokens.size())
+	{
+		m_fValid = (LLStringUtil::convertToF32(cmdTokens[0], m_nPelvisToFootOffset));
+		m_nPelvisToFoot = llclamp<F32>(m_nPelvisToFootOffset / 100, -1.0f, 1.0f);
+	}
+	else if ( (2 <= cmdTokens.size()) && (cmdTokens.size() <= 3) )
+	{
+		m_fValid = (LLStringUtil::convertToF32(cmdTokens[0], m_nPelvisToFoot)) &&
+			 (LLStringUtil::convertToF32(cmdTokens[1], m_nPelvisToFootDeltaMult)) && 
+			 ( (2 == cmdTokens.size()) || (LLStringUtil::convertToF32(cmdTokens[2], m_nPelvisToFootOffset)) );
+	}
+}
+
 // =========================================================================
 // RlvObject
 //
diff --git a/indra/newview/rlvhelper.h b/indra/newview/rlvhelper.h
index 2ab80b6436..9bd123d83d 100644
--- a/indra/newview/rlvhelper.h
+++ b/indra/newview/rlvhelper.h
@@ -175,6 +175,16 @@ protected:
 	uuid_vec_t m_idItems;
 };
 
+struct RlvCommandOptionAdjustHeight
+{
+	RlvCommandOptionAdjustHeight(const RlvCommand& rlvCmd);
+
+	bool	m_fValid;
+	F32		m_nPelvisToFoot;
+	F32		m_nPelvisToFootDeltaMult;
+	F32		m_nPelvisToFootOffset;
+};
+
 // ============================================================================
 // RlvObject
 //