-- Main buttons
	for i, def in pairs(unified_inventory.buttons) do
		local tooltip = def.tooltip or ""
		if def.type == "image" then
			formspec = formspec.."image_button["
					..(0.65 * (i - 1))..",9;0.8,0.8;"
					..minetest.formspec_escape(def.image)..";"
					..minetest.formspec_escape(def.name)..";]"
					.."tooltip["..minetest.formspec_escape(def.name)
					..";"..tooltip.."]"
		end
	end