Hi Yoshiyuki, if you want to save selections, you can save your objects through the menu “File” -> “Save Settings” and enable “Save open object Information to the file”. The rest is not necessary for the selection. If you want to load the selection, load the setting file. Take into account that the geometry file (e.g. bunny.obj) is also loaded, when you are loading the setting file. Hope it is what you wanted. Greets, Matthias M. Von: yoshiyuki yamamoto Gesendet: ‎Dienstag‎, ‎2‎. ‎Juni‎ ‎2015 ‎08‎:‎22 An: openflipper@lists.rwth-aachen.de Hi OpenFlipper Users, Let me know how to save boundary edges as new file. Boundary edges were extracted as the attached file. However, I don't know how to save it. Sincerely yours, Yoshiyuki -- ------------------------------------------------------------ 愛知工業大学工学部土木工学科 山本義幸 〒470-0392　愛知県豊田市八草町八千草1247 TEL:(0565)48-8121（代表）、FAX:(0565)48-3749（代表） HP: http://ait-survey.com/ Mail: y_yamamoto@aitech.ac.jp ------------------------------------------------------------ Department of Civil Engineering, Faculty of Engineering, Aichi Institute of Technology. Yoshiyuki Yamamoto 1247 Yachikusa, Yakusa Cho, Toyota, Aichi 470-0392 JAPAN TEL:+81-565-48-8121 FAX:+81-565-48-3749 HP: http://ait-survey.com/ Mail: y_yamamoto@aitech.ac.jp