[PATCH] Improve documentation of #+startup keyword

[Timothy <tecosaur@gmail.com>]

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Hello all,

I was talking to someone who was finding the behaviour of `#+startup'
confusing, and they managed to work out a table summarising the
behaviour.

I think that this would be a good addition to the manual, and help
clarify the behaviour --- so I've prepared a little patch to the manual.
I notice that there are some `#+cindex' lines lying around but I'm not
quite sure what they do. Please let me know if I should add anything
like that etc.

All the best,
*Timothy*

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From 8ff32dfbf2e14419eb542d58ee39c1545f34354b Mon Sep 17 00:00:00 2001
From: TEC <tec@tecosaur.com>
Date: Fri, 19 Mar 2021 20:01:03 +0800
Subject: [PATCH] doc/org-manual.org: clarify #+startup behaviour

* doc/org-manual.org: clarify the behaviour that each #+startup option
implies.
---
 doc/org-manual.org | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/doc/org-manual.org b/doc/org-manual.org
index e8763ff17..a005cce52 100644
--- a/doc/org-manual.org
+++ b/doc/org-manual.org
@@ -598,6 +598,19 @@ *** Initial visibility
   is requested by startup options and =VISIBILITY= properties in
   individual entries.
 
+A summary of each keyword's behaviour may be seen in the table below.
+| #+startup:          | org-startup-folded | VISIBILITY | shows headings | shows body |
+|---------------------+--------------------+------------+----------------+------------|
+| overview (or fold)  | t                  | x          | lvl1           |            |
+| content             | 'content           | x          | all            |            |
+| show2levels         | 'show2levels       | x          | lvl1-2         |            |
+| ...                 | 'showNlevels       | x          | lvl1-N         |            |
+| show5levels         | 'show5levels       | x          | lvl1-5         |            |
+| showall (or nofold) | nil                | x          | all            | x          |
+| showeverything      | 'showeverything    |            | all            | x          |
+| <DEFAULT>           | 'showeverything    |            | all            | x          |
+
+
 *** Catching invisible edits
 :PROPERTIES:
 :DESCRIPTION: Preventing mistakes when editing invisible parts.
-- 
2.30.1