Is there a record of Xerox's Smalltalk scroll bar anywhere? https://xeroxalto.computerhistory.org/Filene/Smalltalk-76/.document.press!1.pdf https://xeroxalto.c

Is there a record of Xerox's Smalltalk scroll bar anywhere? https://xeroxalto.computerhistory.org/Filene/Smalltalk-76/.document.press!1.pdf https://xeroxalto.computerhistory.org/Filene/Smalltalk-76/.d...