From b371f494cb9a2204fb183795847943e7205868dd Mon Sep 17 00:00:00 2001
From: yehuozhili <673632758@qq.com>
Date: Fri, 24 Sep 2021 15:40:33 +0800
Subject: [PATCH] update doc

---
 packages/dooringx-doc/src/docs/4.5.md | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 packages/dooringx-doc/src/docs/4.5.md

diff --git a/packages/dooringx-doc/src/docs/4.5.md b/packages/dooringx-doc/src/docs/4.5.md
new file mode 100644
index 0000000..0765fdc
--- /dev/null
+++ b/packages/dooringx-doc/src/docs/4.5.md
@@ -0,0 +1,7 @@
+---
+title:  置顶置底问题
+sTitle: 常见问题
+order: 21
+---
+
+有小伙伴反应置顶置底的操作有点不符合常理。置顶和置底其实不应该使用zindex去制作，这样和图层的换顺序相矛盾，而且使用zindex在置底时会有问题，因为元素zindex不能比画布还低，所以置顶置底符合常理的做法应该是去提升顺序。
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