Wordpress - insert image and adjust its size

How are you?
I found the very simple thing today.
I inserted an image by add media for media center but the image size was very small thumbnail.
You can adjust the image size in wordpress as follows:

- Place a cursor where you want to insert an image. Click Add Media button.

- After uploading file, you will be directed to Media library
 Select an image.
Then, scroll down. At right bottom, there is size. You can select among thumnail, medium, large, full size.

 

Then, press insert into media and Update it.
That's it.