An improved user interface improves call center agent responsiveness by persistently (i.e., without interruption) displaying key information at fixed locations in an integrated user interface. The integrated user interface may be partitioned into physical areas on the agent's display screen. While some areas of the agent's display screen may rapidly change, at least one area in a reserved location may persistently display a collection of interaction-specific information that the call center agent can view at all times during a call/chat/email session. The user interface persistently displays each piece of key information at a reserved and unchanging physical location on the agent's screen.