Product: Signals Notebook
Chemical structure embedded in Excel is not shown in Full Size View in Signals Notebook
Chemical structure was copied from ChemDraw and pasted into a regular worksheet in Excel.
This is not a Signals Notebook bug. MS Office Online does not support add-ins. The Full Screen view is not a preview per se, it is actually using the MS Office Online view. You can replicate the issue outside Signals Notebook by loading the same spreadsheet into MS Excel Online directly.
From the ChemOffice tab in Excel, create a ChemOffice Worksheet and add the molecule structure.