# Known Problems

- Some of the error displays and their corresponding remedies are inappropriate.
- The specification for the number of copies may become invalid in the print dialog for a dvi file containing only one page. (Press [Setup...] once to enter [Printer Setup]. Select OK to enable the specification of multiple copies.)
- In the state where the wheel button of a Microsoft IntelliMouse is pressed and the mouse cursor is moved outside dviout where the wheel button is released, the wheel operation by dviout is somewhat strange, for instance, entering the same state as when the wheel button is pressed.
If the wheel button is clicked again in dviout, this is undone.
- There is a fatal bug related to reading TrueType fonts in Windows NT Service Pack 3, and dviout also generates errors (Windows NT will be freezed). Get a patch from Microsoft.
- Handling of color images fails or becomes extremely slow at 600dpi or higher resolutions. This could be a Windows problem.
- White letters with black background or overlapped images or letters are happened to be printed incorrectly by PostScript printer. This is a bug in the Windows printer driver for PostScript. Some other printer drivers have the same problem(Q_P10).
- Sometimes the task bar doesn't disappear under Presentation Mode. Click the task bar and dviout Window by the mouse or change status "always show on the top" or "hide automatically" in the properties of the task bar.