/indra/newview/skins/default/xui/en/floater_test_toolbar.xml

<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
<floater
 legacy_header_height="18"
 can_resize="true"
 height="500"
 layout="topleft"
 name="floater_test_toolbar"
 translate="false"
 width="500">
  <toolbar name="test_toolbar_top"
           button_display_mode="icons_with_text"
           follows="left|right|top"
           height="50"
           width="500"
           left="0"
           top="20"
           min_button_width="0"
           max_button_width="100"
           side="top">
    <command name="avatar"/>
    <command name="build"/>
    <command name="chat"/>
  </toolbar>
  <toolbar name="test_toolbar_left"
           button_display_mode="icons_with_text"
           follows="left|bottom|top"
           height="380"
           width="200"
           left="0"
           top="70"
           min_button_width="100"           
           side="left">
    <command name="avatar"/>
    <command name="build"/>
    <command name="chat"/>
  </toolbar>
  <toolbar name="test_toolbar_right"
           button_display_mode="icons_with_text"
           follows="right|bottom|top"
           height="380"
           width="200"
           right="500"
           top="70"
           side="right">
    <command name="avatar"/>
    <command name="build"/>
    <command name="chat"/>
  </toolbar>
  <toolbar name="test_toolbar_bottom"
           button_display_mode="icons_with_text"
           follows="left|right|bottom"
           height="50"
           width="500"
           left="0"
           bottom="500"
           min_button_width="100"
           side="bottom">
    <command name="avatar"/>
    <command name="build"/>
    <command name="chat"/>
  </toolbar>
</floater>