A professional diagramming tool that helps users visualize complex information through easy-to-understand diagrams.
Dear GeddyZB, Good day! Thank you for posting to Microsoft Community. I am happy to help youGenerally speaking, to open a VSTX file, you require Microsoft Visio installed on your computer. Once Visio is installed, locate the VSTX file you wish to open, right-click on it, and select “Open with” > “Microsoft Visio”. Visio will launch and display the template’s contents. Alternatively, you can launch Visio first and go to “File” > “Open”, navigate to the VSTX file, and click “Open”.If you can't open this file, can I confirm where you downloaded the file template from, and if you downloaded it through a third-party website? If you obtained the template file through a third-party website, there may be a problem with the file itself, and you may need to contact the creator of the file.Looking forward to hearing from you.Sincerely,Tin | Microsoft Community Moderator