Is it possible to import visio diagrams?
It is possible in OmniGraffle Pro version only. We support import and export to Visio format. Here are a few details about how at https://support.omnigroup.com/omnigraffle-import-visio/. We have a free 14 day trial if you would like to try your Visio files first to see how the Import feature works.
Thanks,
Lanette