There may well be situations where you have the need to delete Sheets for various reasons so hence there is the ability to do this also from Drawing Manager.
To Delete Sheets with Drawing Manager select the sheet(s) to be deleted from the main data grid and then click the Delete button from the Sheets Panel of the Home tab.
You will be given two options when deleting sheets to choose from;
Do Not Delete Revit Sheet: if selected this will delete selected sheets from the Drawing Manager SQL project database but WILL NOT delete the actual Revit Sheets from your Revit Project. (default option)
Delete Revit Sheets: if selected will delete selected sheets from the Drawing Manager SQL project database as well as the Revit sheets in your Revit project.
Once you click Yes on the above dialog box the sheet will instantly be deleted from the data grid in drawing Manager and the SQL database and if you have also chosen to delete the Revit Sheet then it will also be instantly deleted from your Revit project without the need to synchronise.