diff --git a/indra/newview/llimconversation.cpp b/indra/newview/llimconversation.cpp
index 64f171ce8f..3ca93b1b07 100644
--- a/indra/newview/llimconversation.cpp
+++ b/indra/newview/llimconversation.cpp
@@ -424,6 +424,7 @@ void LLIMConversation::updateHeaderAndToolbar()
 	mExpandCollapseBtn->setEnabled(!is_torn_off || !mIsP2PChat);
 
 	mTearOffBtn->setImageOverlay(getString(is_torn_off? "return_icon" : "tear_off_icon"));
+	mTearOffBtn->setToolTip(getString(!is_torn_off? "tooltip_to_separate_window" : "tooltip_to_main_window"));
 
 	mCloseBtn->setVisible(!is_torn_off && !mIsNearbyChat);
 
diff --git a/indra/newview/skins/default/xui/en/floater_im_container.xml b/indra/newview/skins/default/xui/en/floater_im_container.xml
index 413e66738d..d23ff28fd0 100644
--- a/indra/newview/skins/default/xui/en/floater_im_container.xml
+++ b/indra/newview/skins/default/xui/en/floater_im_container.xml
@@ -62,6 +62,7 @@
                      layout="topleft"
                      left="10"
                      name="sort_btn"
+                     tool_tip="View/sort options"
                      top="5"
                      width="31" />
                     <button
@@ -75,7 +76,7 @@
                      top="5"
                      left_pad="4"
                      name="add_btn"
-                     tool_tip="Add button on the left panel"
+                     tool_tip="Start a new conversation"
                      width="31"/>
                 </layout_panel>
                 <layout_panel
@@ -94,6 +95,7 @@
                      top="5"
                      left="5"
                      name="expand_collapse_btn"
+                     tool_tip="Collapse/Expand this list"
                      width="31" />
                 </layout_panel>
             </layout_stack>
diff --git a/indra/newview/skins/default/xui/en/floater_im_session.xml b/indra/newview/skins/default/xui/en/floater_im_session.xml
index d6d48130ab..5c74f7f9bb 100644
--- a/indra/newview/skins/default/xui/en/floater_im_session.xml
+++ b/indra/newview/skins/default/xui/en/floater_im_session.xml
@@ -37,6 +37,12 @@
     <floater.string
      name="multiple_participants_added"
      value="[NAME] were invited to the conversation."/>
+     <floater.string
+     name="tooltip_to_separate_window"
+     value="Move this conversation to a separate window"/>
+     <floater.string
+     name="tooltip_to_main_window"
+     value="Move this conversation back to main window"/>
     <view
         follows="all"
         layout="topleft"
@@ -64,6 +70,7 @@
                  layout="topleft"
                  left="5"
                  name="view_options_btn"
+                 tool_tip="View/sort options"
                  top="5"
                  width="31" />
              <button
@@ -78,6 +85,7 @@
                  top="5"
                  left_pad="4"
                  name="add_btn"
+                 tool_tip="Add someone to this conversation"
                  width="31"/>
              <button
                  follows="top|left"
@@ -90,6 +98,7 @@
                  top="5"
                  left_pad="4"
                  name="voice_call_btn"
+                 tool_tip="Open voice connection"
                  width="31"/>
              <button
                  follows="right|top"
@@ -102,6 +111,7 @@
                  top="5"
                  left="283"
                  name="close_btn"
+                 tool_tip="End this conversation"
                  width="31" />
              <button
                  follows="right|top"
@@ -114,6 +124,7 @@
                  top="5"
                  left_pad="5"
                  name="expand_collapse_btn"
+                 tool_tip="Collapse/Expand this pane"
                  width="31" />
              <button
                  follows="right|top"