This file is a replacement for the keyboard.cnf distributed with Tera Term Pro and TTSSH. Just replace the distributed keyboard.cnf with this one. f1 through f10 keys will change primary screen windows EG F1 is ctrl-a + 0 CTRL F1 through CTRL-f10 will change screen windows nested with in another screen EG CTRL-F1 is Ctrl-a+a+0