diff --git a/protos/launcher_log.proto b/protos/launcher_log.proto
index c42b142..17dec37 100644
--- a/protos/launcher_log.proto
+++ b/protos/launcher_log.proto
@@ -149,4 +149,6 @@
   optional int64 action_duration_millis = 4;
   optional int64 elapsed_container_millis = 5;
   optional int64 elapsed_session_millis = 6;
+
+  optional bool is_in_multi_window_mode = 7;
 }