diff --git a/cheatsheet.org b/cheatsheet.org
new file mode 100644
index 0000000..3d74c00
--- /dev/null
+++ b/cheatsheet.org
@@ -0,0 +1,50 @@
+#+STARTUP: indent
+
+* VIM
+** deletion
+| key   | usage                  |
+|-------+------------------------|
+| x     | 删除光标所在处单词     |
+| de    | 删除到本单词末尾       |
+| db    | 删除到前一个单词       |
+| d$    | 删除光标位置到本行结束 |
+| d0    | 删除光标位置到本行开头 |
+| u/C-r | 撤销/重做              |
+|       |                        |
+
+** movement
+| key     | usage                      |
+|---------+----------------------------|
+| w       | 下一个单词                 |
+| e       | 单词尾                     |
+| 0/$     | 行首/尾                    |
+| H/M/L   | 当前页面可见顶部/中间/底部 |
+| <num> G | 跳转到第几行               |
+
+** visual
+| key | usage        | next                   |
+|-----+--------------+------------------------|
+| V   | 行选择       |                        |
+| C-v | 矩形区域选择 | S-i 插入, esc 批量执行 |
+| v   |              | movement               |
+|     |              |                        |
+
+
+** file/split
+| key         | usage        |
+|-------------+--------------|
+| :n/:N       | 文件之间切换 |
+| :b          | 切换到文件   |
+| C-w h/j/k/l | 切换分屏窗口 |
+| ZZ          | :wq          |
+
+
+
+* EMACS
+** org-mode
+| key       | usage    |
+|-----------+----------|
+| C-c \vbar | 创建表格 |
+|           |          |
+|           |          |
+|           |          |
diff --git a/index.md b/index.md
index 16ee598..414ce06 100644
--- a/index.md
+++ b/index.md
@@ -9,6 +9,7 @@ Minecraft 红石玩家, [B站](https://space.bilibili.com/489732092)<br>
 [博客, YouTube 等收集](internet_collections)<br>
 [我对 SciCraft 更新1.19的看法](scicraft_update)<br>
 [我的 gnome 配置](my_gnome_configt)<br>
+[编辑器操作备忘录](cheetsheet)<br>
 <!--
 [对我将来的视频网站的一些畅想](plan_for_my_video_site)<br>
 -->
diff --git a/tsoding_bm.md b/tsoding_bm.md
index 9588c09..25d81de 100644
--- a/tsoding_bm.md
+++ b/tsoding_bm.md
@@ -21,3 +21,7 @@
 - 0:45 "s64 vs i64, fight"
 - 0:50 [boost integer](https://theboostcpplibraries.com/boost.integer)
 - 0:55 `#include <stdurmom.h>`
+- 3:35 calculating pi
+- 3:43 refer to forth
+- 4:00 step debug
+- 4:14 swap relative address like dup