From FreeCAD Documentation
- Select one or more objects. To avoid exporting invisible or duplicate objects:
- Be careful when you use Ctrl+A to select all objects. This will also select invisible objects.
- Select a PartDesign Body by only picking the body itself or its last feature.
- Select a Std Group or a Std Part by only picking the parent object itself or the objects nested inside it.
- Do not use the Std SelectAll command as it will also select sub-elements of PartDesign Bodies.
- There are several ways to invoke the command:
- Select the File → Export... option from the menu.
- Use the keyboard shortcut: Ctrl+E.
- Select the correct file format in the dialog box.
- Enter a filename.
- Press the Save button.