To define a button for the “export project” function on your toolbar (cf. Error: Reference source not found), you have to go on "View->Main ToolBars->Customize". A dialog box is displayed (see Figure 1).

Figure 1 : Dialog Box for Customize Toolbars

You select, "File->Add->Button". A new dialog box is displayed (see Figure 2).

Figure 2 : Dialog Box for Add Button

You select, "Main Menu->File->Export To->EMF UML2(v2.x) XMI File". Click on OK to validate.