org-toc可以为当前Org文件生成一个目录，在这个目录中导航可以跳转到相应的Org位置上。 不过鉴于org本来就是个大纲类的模式，所以我觉得这个module意义不大啊。
在带标题的Org文件(没有标题的话会提示错误)中运行 org-toc-show 命令,就会弹出一个 org-toc buffer，其中列出了当前Org文件的目录。
这个buffer处于 org-toc-mode，并提供了多个导航快捷键，项目快捷键说明可以运行 M-x org-toc-help 来查看,如下所示:
[space] show heading [1-4] hide headlines below this level [TAB] jump to heading [F] toggle follow mode (currently off) [return] jump and delete others windows [i] toggle info mode (currently off) [S-TAB] cycle subtree (in Org) [S] toggle show subtree mode (currently off) [C-S-TAB] global cycle (in Org) [r] toggle recenter mode (currently on, line 0) [:] cycle subtree (in TOC) [c] toggle column view (currently off) [n/p] next/previous heading [s] save TOC configuration [f/b] next/previous heading of same level [q] quit the TOC [g] restore last TOC configuration