Here are the technical details on how to format wiki pages. Some are standard html methods, while others are just for wiki use.

See also...
Wikipedia Cheat Sheet
Help:Formatting - MediaWiki ________________________________________________

Bold...

Formatting: <b>Text</b>
  or: '''Text'''
Example: Text
  or: Text ________________________________________________

Italic...

Formatting: <i>Text</i>
Example: Text ________________________________________________

New line...

(Line break)
Formatting: <br>
  or: <br/>
________________________________________________

Paragraph...

Formatting: <p>Text</p> ________________________________________________

Space (non-breaking)...

Formatting:  
Example: Word1    Word2 ________________________________________________

Bullet point (•)...     (?)

Formatting:
* Item 1
* Item 2

Example:

  • Item 1
  • Item 2

________________________________________________

Link...

Formatting: [[Overview]]
Example: Overview ________________________________________________

Image...

Formatting: [[File:filename.png|<size>]]
  (<size>: NNNpx)
Example: Ic connectivity helper.png ________________________________________________

Block of text...

Formatting: <space>Text
  (<space>: at start of line)
Example:

Text

________________________________________________

Various styles...

Formatting: <pre style="Style/s">Text</pre>
(Style/s: each style ended with ; character)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Text color...

Formatting: <pre style="color: #NNNNNN">
  Text</pre>

Example:

Text


Formatting: <p style="color: #NNNNNN">
  Text</p>

Example:

Text

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Text background color...

Formatting:
 <pre style="background-color: #NNNNNN">
  Text</pre>

Example:

Text

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rounded corners...

Formatting:
  <pre style="border-radius: NNpx;">
  Text</pre>
Example:

Text

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Padding...

Formatting: <pre style="padding: NNpx;">
  Text</pre>

Example:

Text

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Combined styles...

Text

________________________________________________

MacroDroid uses these...

(yet to test all)
Bold text
Important text
Italic text
Emphasized text
Marked text
Smaller text
Deleted text
Inserted text
Subscript text
Superscript text
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Text size...

- Must be at start of line
- The larger the number inside <h></h>, the
  smaller the displayed text will be
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Text (biggest; collapsible)

Formatting: <h1>Text</h1>

Example: < h1>Text

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Text (smaller)...

Formatting: <h2>Text</h2>

Example:

Text

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Text (even smaller)...

Formatting: <h3>Text</h3>

Example:

Text

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Text (smaller still)...

Formatting: <h4>Text</h4>

Example:

Text

________________________________________________
Escaping formatting...

<nowiki>formatted text</nowiki>

Used by macrodroidforum.com:
[PLAIN]formatted text[/PLAIN] ________________________________________________
(TO ADD MORE) ________________________________________________

Headings...

All headings have a separate edit page
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heading (smallest)...

Formatting: (===)Heading===
Example:

Heading

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heading (middle)...

Formatting: (==)Heading==
Example: == Heading (==)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heading (biggest; collapsible)...

Formatting: =Heading(=)
Example: = Heading (=) ________________________________________________