How to import and export Visio files (VSDX) with draw.io for Atlassian Confluence

Hi, visio stencils cannot be imported since visio use (.vss) file

is there a way to import only specific layers of my visio file?

Is there a way to convert Visio Files to packet tracer files?

The diangram exported as a .vsdx file from Drawio looks slightly different in MS Visio (rectangles have rounded corners).