i want to create an icon button but it is with LCD ES2 not possible. (see screenshot)
Apparently no. I did find this thread which has a workaround: Re: building a custom button
Apparently the idea is to place an image, then place a button on top of the image, then edit the button to have no caption, border, or background color, so that the image behind it shows through. A kludge, but it might be your only option.