Texts and icons on the screen:
In the upper left corner of a screen, it shows the number of enemies near the player, their current activity (idle, investigating, or attacking) and state (flying or running). Also, the distance to the nearest enemy is shown.
The color of off-screen enemy icon represents an enemy activity.
This is a DMT mod. It does not work without DMT Modding Tool.
The forum topic of the mod is here.