How do I edit spreadsheet properties?

I noticed that all viewers except for the spreadsheet have a header containing icons for certain context
actions (viewer menu on the left, properties, help, and close on the right). Is there a reason spreadsheet
doesn’t have it? I don’t particularly care about menu, help, and close buttons since those options are
available in the popup menu, but how would I edit properties like font size etc?

Indeed, spreadsheet is a special viewer that is most often used and typically occupies all available space in a view, so we decided to give users more vertical space and got rid of the header. Still, there are few ways to bring up the property editor:

  • Move the mouse cursor inside the empty top left cell and click on the gear icon (:gear:)
  • Use Context menu | Viewer | Properties (actually this option is available for all viewers)