What is the convention for an electric or magnetic field emerging out of the plane of the paper and going into the plane of the paper?

(N/A) The convention used to represent vectors perpendicular to the plane of the paper is as follows:
$1$. $A$ field or current emerging out of the plane of the paper is represented by a dot symbol $\odot$.
$2$. $A$ field or current going into the plane of the paper is represented by a cross symbol $\otimes$.
Note: This convention is based on the visualization of an arrow. $A$ dot $\odot$ represents the tip of an arrow coming towards the observer,while a cross $\otimes$ represents the feathered tail of an arrow moving away from the observer.