RxFxLibrary.xml

<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui">
   <ribbon>
      <tabs>
         <tab idMso="TabFormulas">
            <group id="RxFxLib" label="Rx Function Library">
               <gallery id="RxFx"
                   label="Rx Functions" columns="1"
                   imageMso = "GroupFunctionLibrary"
                   getItemCount = "RxFx_getItemCount"
                   getItemLabel = "RxFx_getItemLabel"
                   getItemScreentip = "RxFx_getItemScreentip"
                   getItemSupertip = "RxFx_getItemSupertip"
                   onAction = "RxFx_Click"
                   showItemLabel = "true"
                   size="large">
                  <button id="insertFx"
                     imageMso = "GroupFunctionLibrary"
                     label = "Insert Function"
                     screentip="Insert Function (Shift+F3)"
                     supertip = "Work with the formula in the current cell. You can easily pick functions to use and get help on how to fill out the input values."
                     onAction="insertFx_Click"/>
               </gallery>
               <button id="updateFx"
                   imageMso = "ConnectedToolSyncMenu"
                   label = "Update Fx"
                   screentip="Update Functions"
                   supertip = "Update all functions in current workbook."
                   onAction = "updateFx_Click"
                   size="large"/>
               <button id="getHelp"
                   imageMso = "Help"
                   label = "Help"
                   screentip="Help"
                   supertip = "Open link to webpage."
                   onAction = "getHelp_Click"
                   size="large"/>
            </group>
         </tab>
      </tabs>
   </ribbon>
</customUI>