diff --git a/.gitignore b/.gitignore
index 7d8ae96..63027b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,6 +24,7 @@ lib
 lib64
 __pycache__
 MANIFEST
+.idea/
 
 # Installer logs
 pip-log.txt
diff --git a/readme.md b/readme.md
index ba5cd1b..efc2900 100644
--- a/readme.md
+++ b/readme.md
@@ -131,6 +131,12 @@ Extra Data
 
 This would be useful if you are using a logging handler that ships the `logging.LogRecord` as JSON to some service like a document oriented data store, Elasticsearch, etc.
 
+You also could pass extra params via `.emit` call like
+```
+trace = LogTrace(logger=logger)
+trace.emit('message', extra={'key': 'value'})
+```
+
 Testing
 -------