Display conversion method symbolically and textually next to arrow

api.lua

@@ -152,6 +152,7 @@ end
 
 unified_inventory.register_craft_type("normal", {
 	description = "Crafting",
+	icon = "ui_craftgrid_icon.png",
 	width = 3,
 	height = 3,
 	get_shaped_craft_width = function (craft) return craft.width end,
@@ -167,6 +168,7 @@ unified_inventory.register_craft_type("normal", {
 
 unified_inventory.register_craft_type("shapeless", {
 	description = "Mixing",
+	icon = "ui_craftgrid_icon.png",
 	width = 3,
 	height = 3,
 	dynamic_display_size = function (craft)
@@ -181,6 +183,7 @@ unified_inventory.register_craft_type("shapeless", {
 
 unified_inventory.register_craft_type("cooking", {
 	description = "Cooking",
+	icon = "default_furnace_front.png",
 	width = 1,
 	height = 1,
 })
@@ -188,6 +191,7 @@ unified_inventory.register_craft_type("cooking", {
 
 unified_inventory.register_craft_type("digging", {
 	description = "Digging",
+	icon = "default_tool_steelpick.png",
 	width = 1,
 	height = 1,
 })

register.lua

@@ -224,9 +224,10 @@ unified_inventory.register_page("craftguide", {
 
 		local craft_type = unified_inventory.registered_craft_types[craft.type] or
 				unified_inventory.craft_type_defaults(craft.type, {})
-		formspec = formspec.."label[6,3.35;" .. S("Method:") .. "]"
-		formspec = formspec.."label[6,3.75;"
-				..minetest.formspec_escape(craft_type.description).."]"
+		if craft_type.icon then
+			formspec = formspec..string.format(" image[%f,%f;%f,%f;%s]",5.2,0.85,0.5,0.5,craft_type.icon)
+		end
+		formspec = formspec.."label[5,1.50;" .. minetest.formspec_escape(craft_type.description).."]"
 		formspec = formspec..stack_image_button(6, 1, 1.1, 1.1, "item_button_usage_", ItemStack(craft.output))
 		local display_size = craft_type.dynamic_display_size and craft_type.dynamic_display_size(craft) or { width = craft_type.width, height = craft_type.height }
 		local craft_width = craft_type.get_shaped_craft_width and craft_type.get_shaped_craft_width(craft) or display_size.width