I have spent a lot of time looking for this information on the Internet。Unfortunately,I can not find it。Please help me。Thank you，Thank you。 （I do not how to describe this question。May god forgive me for my poor English。）
9
- 2$\begingroup$ Is the opener that you want Triangle that collapse cells? or are you looking for how to create full documentation/documentation pages? $\endgroup$Kuba– Kuba2018-07-18 08:44:03 +00:00Commented Jul 18, 2018 at 8:44
- $\begingroup$ Welcome! Start with the tour, How to Ask, and the help center. Always edit if improvable, show due diligence, give brief context, include minimal working example of code and data in formatted form. By doing all this you help us to help you and likely you will inspire great answers. The site depends on participation, as you receive give back: vote and answer questions, keep the site useful, be kind, correct mistakes and share what you have learned. $\endgroup$rhermans– rhermans2018-07-18 08:44:48 +00:00Commented Jul 18, 2018 at 8:44
- 1$\begingroup$ closely related q/a: Create notebook with a section extracted from Documentation $\endgroup$kglr– kglr2018-07-18 08:47:40 +00:00Commented Jul 18, 2018 at 8:47
- 1$\begingroup$ @ΑλέξανδροςΖεγγj就是我想把我的mathematica笔记本的风格弄成帮助文档的风格，我该怎么办。 $\endgroup$我心永恒– 我心永恒2018-07-18 10:45:56 +00:00Commented Jul 18, 2018 at 10:45
- 1$\begingroup$ then this question is a duplicate of Triangle that collapse cells, no? $\endgroup$kglr– kglr2018-07-18 14:37:33 +00:00Commented Jul 18, 2018 at 14:37
| Show 4 more comments
1 Answer
$\begingroup$ $\endgroup$
1 If you are looking for the ability to click ">" to open and close cells, for the current Notebook, you can set this in the preferences. You can open the Preferences, Click the Advanced Tab and Click the "Open Option Inspector" Button. 
Select from the dropdown menu Selected Notebook, and change the Option for Cell Options, Display Options, Show Group Opener to for example "Outside Frame":
This should give you in this example the ability to open and close cells with clicking ">": 
- $\begingroup$ Oh，Thank you。I want this。 $\endgroup$我心永恒– 我心永恒2018-07-19 03:49:28 +00:00Commented Jul 19, 2018 at 3:49