Add search to tmux, explain mouse support for scrolling (#2036)

tmux.md

@@ -33,13 +33,13 @@ category: CLI
 
 ### Scrolling
 
-    C-b [       # Enter scroll mode then press up and down
+    C-b [       # Enter scroll mode then press up and down, you can also scroll with mouse support enabled (`set -g mouse on` in `~/.tmux.conf`)
 
 ### Copy/paste
 
-    C-b [       # 1. Enter scroll mode first.
-    Space       # 2. Start selecting and move around.
-    Enter       # 3. Press enter to copy.
+    C-b [       # 1. Enter scroll mode first
+    Space       # 2. Start selecting and move around
+    Enter       # 3. Press enter to copy
     C-b ]       # Paste
 
 ### Panes
@@ -68,9 +68,16 @@ category: CLI
     C-b ( )     # Switch through sessions
     $ tmux attach
 
+### Search in buffer
+
+    C-b [       # 1. Enter scroll mode first, you can also scroll with mouse support enabled
+    C-s         # 2. Enter search mode, type pattern then press Enter to start search
+    n or N      # 3. Go to the previous or next match
+    C-c         # 4. Exit search and scroll mode
+
 ### Niceties
 
-    C-b t    # Time
+    C-b t       # Display a clock, press any key to quit
 
 ## Status formats