Forums: TechDoc Document Manager QuestionsCan you upload OmniGraffle files to TechDoc? Comments Joey Prevo TechDoc handles any file. I'm Wed, 09/30/2015 - 17:01 TechDoc handles any file. I'm not familiar with OmniGraffle files; I'm not sure what file extension or mime type they use. If they have a vendor specific/custom file extension and/or mime type, it will need to be added to the TechDoc in the Mime Types section under the Admin panel if it is not yet defined. Once you place an omni file into TechDoc, if it appears with a question mark icon you'll must likely need to define the mime type, assign it a thumbnail image to use, etc. Let us know what you find, we'll be happy to add a custom mime type if need be.