Copy in Context menu in editor grayed out

Question

And when this happens shortcut Ctrl + A will not work either. It happens many times, and only restarting Studio helps solve the issue. Any ideas? Version 15.1.2.48878

Ana-Maria Matefi · Answer

Hello Yang Lifu (YangLifu), 
 In order to have the "Copy" button active you need to right click on the exact string selected:

Trados Studio > 1. Trados Studio

Copy in Context menu in editor grayed out