1) First open your velocity and click select the particular symbol which one you want to deactivate from velocity.
>> Then click on the "Deactivate" button as shown in the below image.
2) Then you can do the "Deactivate" Symbol from the "Symbol" menu in velocity as shown in the below image.
3) If you want to do deactivate all symbols at one time so you need to click on the "Symbol" menu and select the "Deactivate all symbols" option in velocity.
4) which symbols are "untick" the checkbox in the below image that means the symbols are deactivated in your velocity.
