diff --git a/.vimrc b/.vimrc
index 9e4ac46..dd557d5 100644
--- a/.vimrc
+++ b/.vimrc
@@ -37,6 +37,8 @@ set smartcase
 set hlsearch
 set incsearch
 
+set colorcolumn=120
+
 nmap о j
 nmap л k
 nmap р h
diff --git a/doc/tips.md b/doc/tips.md
index c84bdce..e9643a4 100644
--- a/doc/tips.md
+++ b/doc/tips.md
@@ -38,3 +38,5 @@ sudo systemctl start service.service  # start custom service
 sudo systemctl status service.service  # check status
 sudo systemctl enable service.service  # autostart custom service
 ```
+
+set caps as ctrl for tmux prefix Ctrl+a