Visio Viewer 1.0 is a software application that enables users to view Visio diagrams and drawings, even without having Microsoft Visio installed on their computers. It supports multiple formats, including VSD, VSS, VST, VDX, VSX, and VTX. The software permits detailed viewing with zoom, pan, full screen and layer display options. Additionally, it can print Visio drawings with high precision. The software is compatible with Internet Explorer and requires Windows operating system to operate.