Hello Pavel and Toufiq,
Thank for your input. Very helpful!
I will try to minimize the size of the large size images. I assume you mean the full screen images on top of the page just below the menu. Just a question to put me on the right track.
To create the full screen coverage I need the width dimension of 1920px I believe. But the images are 144 dpi at the moment and . png.
Is bringing the dpi down to 72 the solution, or is that just a first start. Is more needed to optimize the loading time?
Thanks already and looking forward to your awnser.