Hi Kris,
I looked up the split button for the Explore control. Here is the id:
esri_mapping_exploreSplitButton
This is how I found it:
* I hovered over one of the menu items in this control to find the id. Screenshot below.
* It is in the "Mapping" DAML since the id says "esri_mapping..". In the ADMapping.daml, search for esri_mapping_infoNone button. You will find the parent splitbutton it belongs in.
<splitButton id="esri_mapping_exploreSplitButton" keytip="E" extendedCaption="Open current explore tool">
<tool refID="esri_mapping_exploreTool" />
<button refID="esri_mapping_infoTopmostLayerButton" />
<button refID="esri_mapping_infoAllLayersButton" />
<button refID="esri_mapping_infoSelectableLayersButton" />
<button refID="esri_mapping_infoSelectedTOCButton" />
<button refID="esri_mapping_infoNoneButton" />
<button refID="esri_mapping_screenPlanePanButton" separator="true" />
<button refID="esri_mapping_firstPersonModeButton" />
</splitButton>
Thanks
Uma