When developing a design for a laser cutter, I export and test cut parts dozens of times. This makes every step in the export process seam tedious because I may be doing it every couple of minutes. In CorelDraw I even went through the trouble of making a macro to export a DXF to a preset location with a hotkey.

Request: add export options, set either in the dialogue window or in a preferences section. The first option allows a given file type to be exported without the constraints visible. Designers exporting a DXF or gcode to a machine will never want the constraints to be included. The 'section only' option allows only the selected lines/curves to be exported. The option to export only the selected lines is important because I usually design all the parts required for a design together in a single file, but only want to cut one at a time - either for a quick test or because I need additional copies. 

Although the two export options above are the most important to people doing rapid prototyping, I would love for the preference section to allow a file name, a location, and a file type to be set. A hot key combo (such as Ctrl+Shift+E) then instantly saves the file with the settings for quick export. The user can then quickly load the same file from the same location into the machine software. As someone who might repeat the process of exporting and then importing the file into the machine software several hundred times in a day, this feature can save a lot of mental energy clicking through a dialogue window.