From ced9fbfb71fcffc8d9286b20dbd0b921ff09d41c Mon Sep 17 00:00:00 2001
From: ruki <waruqi@gmail.com>
Date: Mon, 13 May 2019 22:56:15 +0800
Subject: modify docs

---
 manual.md | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'manual.md')

diff --git a/manual.md b/manual.md
index c3bdb388..c8c10b72 100644
--- a/manual.md
+++ b/manual.md
@@ -457,6 +457,10 @@ set_xmakever("2.1.0")
 
 ###### Add sub-project directories
 
+<p class="tips">
+For xmake 2.x and above, try to use the [includes](#includes) interface, which is a generic version of add_subdirs and add_subfiles, and supports some built-in extensions.
+</p>
+
 This interface will add sub-project directories to the current `xmake.lua`, it will load the `xmake.lua` file of the sub-directories.
 
 For example, assume we have the following project directory tree:
@@ -491,6 +495,10 @@ $ xmake build tbox
 
 ###### Add sub-project files
 
+<p class="tips">
+For xmake 2.x and above, try to use the [includes](#includes) interface, which is a generic version of add_subdirs and add_subfiles, and supports some built-in extensions.
+</p>
+
 `add_subfiles` is similar to [add_subdirs](#add_subdirs).
 
 The only difference is that this interface specifies the path to the 'xmake.lua' file directly, rather than a directory.
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