Since you are trying to understand how the crew is aware of law reconfiguration, it's important to look at this event in its context, why it does happen and what are the consequences for the control of the aircraft. You may skip this overview and go to the direct answer to your question which is in the last section of this post.
Flight control system and ...
A340 FCOM 1.27.40 (Highlights mine.)
Edit: While this table is from the A340 manual, it's the same for the A320 for the following:
Master Caution Light
Flight Controls page on Systems Display is auto-called
Message on the PFD
Plus the highlighted E/WD (Engine/Warning Display) message
Warnings are inhibited on takeoff and landing (refer to ...
Both the "APU AUTO SHUT DOWN" and "APU EMER SHUT DOWN" appear on the lower-left section of the E/WD (the upper display of the ECAM) as amber messages.
In the procedures section of the FCOM, the title is on a white background. The introduction of that section, "FCOM Procedure Layout", explains how the title formatting corresponds to how the actual message ...
ECAM and FBW are not directly related, but information and alerts regarding the flight control computers and actuators are displayed on the ECAM screens, like any other information not visible on the primary flight display or the navigation display.
The fly-by-wire concept is actually simple:
In traditional aircraft, the control surfaces like ...
The Hydraulic System is displayed only on the lower ECAM which is supplied by the DMC2. Nothing about the hydraulic system is shown on the upper ECAM supplied by the DMC1.
That is not true. If DMC1 or DMC2 fails, DMC3 takes over. But if the display fails, the other display takes over. So the hydraulics page can be displayed on the upper display. It can even ...
When the stall has developed the aircraft is no longer in normal control law for any axis (see more in FCTM at OP-020. P 14):
As soon as the aircraft is outside the flight envelope, the control laws transition to abnormal attitude which is the combination of:
This is something between alternate and direct, and is ...
enter link description here
A320 ECAM "WHEEL" page
The LGCIUs (landing gear control and interface unit) receive position information from the landing gear, cargo doors, and landing flap systems and process gear and door position, sequencing, control, and gear lever selection.
When one of two LGCIU is inoperative (№6) amber XXXs in the ...