Part splitter window opens so that you can select any of its tabs. ">
Open Part SplitterKeyCreator \ View \ Control-Bars \ Part-Splitter \ Open-Part-Splitter
Location: View>Control Bars>Open Part Splitter
When you select this function, the Part splitter window opens so that you can select any of its tabs. Note that by default the Part splitter opens to the left of the display view. To reverse this use Tools>Options>Miscellaneous>Display Part Splitter on the right
Click here for more information on the Part splitter window.