Visio Online: Can't Reduce Canvas Size

Take this:

• Fit to Drawing: On the Design tab, look for the Size option. Select Fit to Drawing to automatically adjust the canvas size to fit your content.
• Page Setup Dialog: If the above doesn't work, you can manually adjust the page size:
  • Go to the Design tab and click on the Page Setup dialog box launcher.
  • Under the Page Size tab, select Custom Size and enter dimensions that better match your diagram.
• Infinite Canvas: By default, Visio Online uses an infinite canvas. If your diagram appears small, it might be due to the infinite canvas setting. You can try enabling page breaks under the View tab to better visualize the actual page size.