Using IFC Files
https://help.autodesk.com/cloudhelp/2023/ENU/RevitLT-Model/files/GUID...You can use information from Industry Foundation Classes (IFC) files in Revit LT models. To use IFC files in a model, do one of the following Open (import) the IFC file in Revit LT to create a new model that uses the IFC data as a starting point. Later changes to the original IFC file are not reflected in the Revit model. Link the IFC file to an existing Revit model to reference its ...
Opening Files - help.autodesk.com
help.autodesk.com › cloudhelp › 2015To open a Revitfile, use any of the following methods: In the Recent Files window, under Projects or Families, click the desired option. Press CTRL+O. Click (Open). Click (Open), and select a file type. Click , and select a file from the Recent Documents list. Click (Open) on the Quick Access toolbar.