diff --git a/lua/bookmarks/config.lua b/lua/bookmarks/config.lua
index e32194c..b32e7d1 100644
--- a/lua/bookmarks/config.lua
+++ b/lua/bookmarks/config.lua
@@ -1,10 +1,10 @@
 ---@class Bookmarks.Config
----@field sign { icon: string, highlight: string }
+---@field signs Signs
 local default_config = {
 	json_db_path = vim.fs.normalize(vim.fn.stdpath("config") .. "/bookmarks.db.json"),
-	sign = {
-		icon = "󰃁",
-		highlight = "BookmarksNvimSign",
+	signs = {
+		mark = { icon = "󰃁", color = "grey" },
+		-- annotation = { icon = "󰆉", color = "grey" },
 	},
 }
 
@@ -14,8 +14,7 @@ vim.g.bookmarks_config = default_config
 local setup = function(user_config)
 	local cfg = vim.tbl_deep_extend("force", vim.g.bookmarks_config or default_config, user_config or {})
 		or default_config
-	vim.fn.sign_define(cfg.sign.highlight, { text = cfg.sign.icon, texthl = cfg.sign.highlight })
-	vim.api.nvim_set_hl(0, cfg.sign.highlight, { foreground = "grey" }) -- control the color of the sign
+	require("bookmarks.sign").setup(cfg.signs)
 	vim.g.bookmarks_config = cfg
 end
 
diff --git a/lua/bookmarks/sign.lua b/lua/bookmarks/sign.lua
index 16f8c30..a1427de 100644
--- a/lua/bookmarks/sign.lua
+++ b/lua/bookmarks/sign.lua
@@ -1,13 +1,30 @@
 local repo = require("bookmarks.repo")
 local ns_name = "BookmarksNvim"
+local hl_name = "BookmarksNvimSign"
 local ns = vim.api.nvim_create_namespace(ns_name)
 
+---@class Signs
+---@field mark Sign
+-- ---@field annotation Sign -- TODO:
+
+---@class Sign
+---@field icon string
+---@field color ?string
+
+---@param signs Signs
+local function setup(signs)
+	for k, _ in pairs(signs) do
+		vim.fn.sign_define(hl_name, { text = signs[k].icon, texthl = hl_name })
+		vim.api.nvim_set_hl(0, hl_name, { foreground = signs[k].color })
+	end
+end
+
 ---@param line number
 local function place_sign(line, buf_number, desc)
-	vim.fn.sign_place(line, ns_name, vim.g.bookmarks_config.sign.highlight, buf_number, { lnum = line })
+	vim.fn.sign_place(line, ns_name, hl_name, buf_number, { lnum = line })
 	local at_end = -1
 	vim.api.nvim_buf_set_extmark(buf_number, ns, line - 1, at_end, {
-		virt_text = { { "  " .. desc, vim.g.bookmarks_config.sign.highlight } },
+		virt_text = { { "  " .. desc, hl_name } },
 		virt_text_pos = "overlay",
 		hl_mode = "combine",
 	})
@@ -52,6 +69,7 @@ local function bookmark_sign_autocmd()
 end
 
 return {
+	setup = setup,
 	bookmark_sign_autocmd = bookmark_sign_autocmd,
 	refresh_signs = safe_refresh_signs,
 }