Lower ECAM

Hello,
Just wanted to ask can I run upper and lower ecam in the same PC
with two "10 tft displays and dualhead display card?
I can activate lower ecam with GC program
but I can find only PFD,ND and upper ecam. Any key combination to
wake up lower one? Those two displays are stretched as one wide display.
Do I really need to buy a new PC for just low ecam?
I have now PC1=FS/server+FCU, PC2=PFD+ND, PC3=upper ecam,PC4=MCDU,
PC5(laptop)=PMsystems.
So PC3 for upper and lower - any possibility?

I got answer from Enrico. On page F7 of if in they are as individual
instances ctrl + tab and shift + tab

Yours, Markus