Convert a dimmer switch to a regular switch

Hi all, In my apartment I have a panel like this , which i couldn’t find any screw to open it It seems like a very popular type in Netherlands, so you know how can I open it ? I want to change all dimmer switch to regular switch , and i found multiple regular switch from Gamma , but how can i check with one will fit to mine ? Or they are universal here ? Thank you very much for all of the help ❤️

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