Export cross section as ...
This option allows you to export a set of cross sections to the DXF format, to be read for example in AutoCAD. When selecting this function, you are asked to select the output filename. After that, you are asked to provide the decimal precision that the cross sections' points should have.
You can specify a distinct output filename and decimal precision for each cross section. Otherwise, in the select file dialog you can check Do not ask anymore and you will set the decimal precision only once for all the cross sections. The filename will be also assigned automatically.