Hotkey:* Ctrl+O
Files of type: By default, you will open a *.tcw file. Use this list if you want to open a file of a different format. See Other CAD Formats.
Open as read-only: A read-only file can be viewed only; it cannot be edited.
Description: Displays text entered in the Subject field of the Summary Info window. See Summary Info.
Show Preview: Displays a thumbnail of the drawing. Only TurboCAD DoubleCAD files (*.tcw and *.tct) can display previews.
Setup: When importing files of other formats, provides access to conversion options.
...