Resizing PDF size when exported from MsVisio

You can follow these steps:

1. In MsVisio, on the File tab, click Options, and then in the navigation pane, click Customize Ribbon.
2. In the Main Tabs pane, click to select the Developer check box, and then click OK.
3. On the Developer tab, click Show ShapeSheet, and then click Page.
4. In the Print Properties section of the ShapeSheet, set the following values to 0:

           PageLeftMargin
           PageRightMargin
           PageTopMargin
           PageBottomMargin

           Use the Fit to Drawing command again.
           The page now resizes to fit the same dimensions of the drawing, and there is no margin.