Add Symbol button not visible

Hi,
While I wish to add a symbol using the button like in the official tuto below:
image

the button is not visible in my interface:
image

Thanks a lot for your help :slight_smile:
@Seb_M

Screen Shot 2022-03-13 at 6.37.59 PM

The UI was updated :slight_smile:

Click on the square for creating new symbol