like this?
"anchor_from": "top_left",
"anchor_to": "top_left",
"size": [ "fill", 32 ],
"$button_text": "#form_button_text",
"$button_text_binding_type": "collection",
"$button_text_grid_collection_name": "form_buttons",
"$button_text_max_size": [ "100%", 20 ],
"$default_button_texture|default": "textures/ui/button_borderless_light",
"$hover_button_texture|default": "textures/ui/button_borderless_lighthover",
"$pressed_button_texture|default": "textures/ui/button_borderless_lightpressed",
"$locked_button_texture|default": "textures/ui/disabledButtonNoBorder",
"bindings": [
{
"binding_type": "collection_details",
"binding_collection_name": "form_buttons"
}
]
}
}
]
},```