ZInterrupt pops up a window with the words "INTERRUPT!!!" on it when both of the following conditions are met:
- The enemy is casting an ability that can be interrupted.
- The enemy has less interrupt armor than their maximum interrupt armor (i.e. someone else has used an interrupt).
The window is a progress bar for the cast (signifying the amount of time left to interrupt) and also shows the current interrupt armor out of the maximum interrupt armor of the enemy.
/zi brings up the interrupt window, allowing you to resize and move it.
/zinterval <number> allows you to set the refresh rate of the interrupt bar (lower value = smoother and more responsive).