Markdown's syntax is intended to be used as a format for fast writing for the web. Its syntax is very small, corresponding only to a very small subset of HTML tags. The idea is to create a syntax that makes it easier to add or edit content. It is quite popular among content creators.

In discussion and partially added in Tiki20 it was fully integrated in Tiki25 (still experimental in Tiki25) with the addition of an option to use Tiki-Flavored Markdown and option to select which syntax you want to use. Tiki site that used previously the Wiki Syntax can be converted to use the Markdown Syntax, see: Converting from Tiki syntax to Markdown

Like the Wiki syntax, the Markdown syntax uses a character repeated twice for most functions, but it also has a few two-character combinations.

By default Tiki uses the Wiki Syntax. To enable the Markdown Syntax, log as admin go to Settings => Control Panels => Main Features => Editing and Plugins (/tiki-admin.php?page=textarea).
On the General Settings tab, navigate to the Markdown section.

To come when this site will use markdown
Please refer to this guide: https://www.markdownguide.org/basic-syntax/

Markdown applications don’t agree on how to handle a missing space between the number signs (#) and the heading name. For compatibility, always put a space between the number signs and the heading name.
Do this : # Here's a Heading
Don't do this: #Here's a Heading

Don't put tabs or spaces in front of your paragraphs.

Examples

Headings

Use a single or a succession of this character to set the heading level "#"

1. Heading level 1

   Heading level 1

Heading level 1

1. Heading level 2

   Heading level 2

etc...
Heading level 2

Line Break

Line Breaks
To create a line break or new line (
), end a line with two or more spaces, and then type return.

Bold text

To bold text, add two asterisks "*" or underscores "_" before and after a word or phrase. To bold the middle of a word for emphasis, add two asterisks without spaces around the letters.

I just love **bold text**.
I just love bold text.

To italicize text, add one asterisk or underscore before and after a word or phrase. To italicize the middle of a word for emphasis, add one asterisk without spaces around the letters.

Italicized text is the *cat's meow*.
Italicized text is the _cat's meow_.

Converting from Tiki syntax to Markdown
PluginMarkdown
Tiki-Flavored Markdown

• https://www.markdownguide.org/basic-syntax/