이렇게(i-reoh-ge, ireohge)
Used to indicate something close to the speaker or an action/state the speaker is directly performing.
When to use
Speaker proximity, Direct action description, Method presentation
The nuance
Used when referring to something near the speaker or describing a direct action or state by the speaker.
저렇게(jeo-reoh-ge, jeoreohge)
Used to refer to something distant from both the speaker and listener.
When to use
Far from speaker and listener, Out of sight object, Remote indication
The nuance
Used when referring to something far from both speaker and listener, often out of sight or distant.
그렇게(geu-reoh-ge, geureohge)
Used to refer to something close to the listener or a method/state known to the listener.
When to use
Listener proximity, Listener-known situation, Indirect explanation
The nuance
Used when referring to something related or known to the listener, suitable for indirect explanation or listener-centered expressions.