In Chrome, scrolling the mouse wheel in the viewer doesn’t do anything. It’s not possible to zoom in or zoom out.
The number of lines to scroll with the mouse wheel must be ‘3’; otherwise, the mouse wheel doesn’t work correctly.
To change the mouse settings:
Press the Windows key. Type ‘Mouse Settings’.
The Mouse Setting dialog will open.
Choose ‘Multiple lines at a time’.
Slide the horizontal scroll bar to ‘3’.