Allow setting OS window size in session files

docs/changelog.rst

@@ -26,6 +26,8 @@ To update |kitty|, :doc:`follow the instructions <binary>`.
 
 - Allow creating new OS windows in session files (:iss:`1514`)
 
+- Allow setting OS window size in session files
+
 - Allow specifying a value of ``none`` for the :opt:`selection_foreground`
   which will cause kitty to not change text color in selections (:iss:`1358`)
 

docs/index.rst

@@ -345,6 +345,8 @@ For example:
 
     # Create a new OS window
     new_os_window
+    # set new window size to 80x25 cells
+    os_window_size 80c 25c
     launch sh
     # Make the current window the active (focused) window
     focus