[Chimera-users] the "select" funtion of mouse is disable

Dear all,I find the "select" funtion of mouse in Chimera is disable. I can not use "ctrl+left mouse button" to select any item in the structure. Have you met this problem before? My systems is windows 7 and the Chimera version is 1.10.1. How to solve this problem? Do I need to change some setting?Best regards,Yeping Sun Institute of Microbiology, Chinese Academy of Sciences