ensure read /write is enabled in the partical system texture

hello im new to unity and i got this eror “ensure read/write is enabled at the partical system texture”
i know i need to check the box at the inspector but i dont know how to reach the inspector to enable it.
if someone could tell me step by step how to reach the inspector in order to fix this eror i will be very thankfull.(i dont know how to reach the partical systems texture)

Go to the sprite you have used for the Particle System.
Can’t upload image here. Something wrong with the site.
So here is an Image for you to see how to fix it