How to turn on the Drawing Explorer:
http://office.microsoft.com/en-au/visio-help/edit-your-drawing-in-the-drawing-explorer-window-HA010357451.aspx
To make a theme available to other Visio files:
I haven't worked out how to apply a custom theme to an existing Visio diagram.
http://office.microsoft.com/en-au/visio-help/edit-your-drawing-in-the-drawing-explorer-window-HA010357451.aspx
To make a theme available to other Visio files:
- Save the new theme with a name.
- Save the document as a template,
- Use this template to create each new file.
I haven't worked out how to apply a custom theme to an existing Visio diagram.
