Make sure that you save your document as encapsulated PostScript. Encapsulated PostScript documents use a bounding box which depends on the relative sizes inside the picture, not on the underlying page. This makes it possible to include it in an arbitrary place, scale it, rotate it etc.
The encapsulated PostScript file can be included in a LATEX document by an extension package like Psfig or epsf (for LATEX) or graphicx (for LATEX2e). With these packages it is possible to scale and rotate the included figure. All example diagrams and tables in this user's guide were made with TCM and included as encapsulated PostScript with the graphicx package.
If you do not need to scale or rotate, make sure that the document in the TCM editor fits to one page. To fit you can move it to the first page with the Center button and scale it with the Whole Document command in the Zoom menu.