[Gimp-user] Remove Transparencies

[bungle77 <forums gimpusers com>]

Hi, i am newby with graphic program.
I am make a  photomontage with three layer, the second layer has alpha channel
and i don't want to dispaly the little square.
I tried to follow these instructions
https://docs.gimp.org/2.10/it/gimp-layer-alpha-remove.html
I tryied to go to windows->channel and hide the alpha chanel, but i still see
those little square.
Pls help me

Attachments:
* https://www.gimpusers.com/system/attachments/1373/original/Immagine.png

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bungle77 (via www.gimpusers.com/forums)