diff --git a/doc/guidance/usage.md b/doc/guidance/usage.md
index f75acf1..adafd99 100644
--- a/doc/guidance/usage.md
+++ b/doc/guidance/usage.md
@@ -1,12 +1,12 @@
 
 # Usage
 
-### Simple face swaping for already face-aligned images
+### Simple face swapping for already face-aligned images
 ```
 python test_one_image.py --isTrain false  --name people --Arc_path arcface_model/arcface_checkpoint.tar --pic_a_path crop_224/6.jpg --pic_b_path crop_224/ds.jpg --output_path output/
 ```
 
-### Face swaping for video
+### Face swapping for video
 - Swap only one face within the video(the one with highest confidence by face detection).
 ```
 python test_video_swapsingle.py --isTrain false  --name people --Arc_path arcface_model/arcface_checkpoint.tar --pic_a_path ./demo_file/Iron_man.jpg --video_path ./demo_file/mutil_people_1080p.mp4 --output_path ./output/mutil_test_swapsingle.mp4 --temp_path ./temp_results
@@ -20,7 +20,7 @@ python test_video_swapmutil.py --isTrain false  --name people --Arc_path arcface
 
 
 
-### Face swaping for Arbitrary images
+### Face swapping for Arbitrary images
 - Swap only one face within one image(the one with highest confidence by face detection). The result would be saved to ./output/result_whole_swapsingle.jpg
 ```
 python test_wholeimage_swapsingle.py --isTrain false  --name people --Arc_path arcface_model/arcface_checkpoint.tar --pic_a_path ./demo_file/Iron_man.jpg --pic_b_path ./demo_file/mutil_people.jpg --output_path ./output/