diff --git a/README.md b/README.md
index 232feb03f..315f71c50 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,8 @@ namespaced, cleaned up, improved and other stuff.
 
 ## Documentation
 
-A documentation created with [phpDocumentor](https://www.phpdoc.org/) can be found at https://chillerlan.github.io/php-qrcode/ (WIP).
+See [the wiki](https://github.com/chillerlan/php-qrcode/wiki) for advanced documentation. 
+An API documentation created with [phpDocumentor](https://www.phpdoc.org/) can be found at https://chillerlan.github.io/php-qrcode/ (WIP).
 
 ### Requirements
 - PHP 7.4+
@@ -49,7 +50,7 @@ A documentation created with [phpDocumentor](https://www.phpdoc.org/) can be fou
 
 via terminal: `composer require chillerlan/php-qrcode`
 
-*composer.json* (note: replace `dev-main` with a [version constraint](https://getcomposer.org/doc/articles/versions.md#writing-version-constraints), e.g. `^3.2` - see [releases](https://github.com/chillerlan/php-qrcode/releases) for valid versions)
+*composer.json* 
 ```json
 {
 	"require": {
@@ -59,18 +60,19 @@ via terminal: `composer require chillerlan/php-qrcode`
 }
 ```
 
+Note: replace `dev-main` with a [version constraint](https://getcomposer.org/doc/articles/versions.md#writing-version-constraints), e.g. `^3.2` - see [releases](https://github.com/chillerlan/php-qrcode/releases) for valid versions.
 For PHP version ... 
   - 7.4+ use `^4.2`
   - 7.2+ use `^3.3`
   - 7.0+ use `^2.0`
   - 5.6+ use `1.0.9` (please let PHP 5 die!)
 
-### Usage
+### Quickstart
 We want to encode this URI for a mobile authenticator into a QRcode image:
 ```php
 $data = 'otpauth://totp/test?secret=B3JX4VCVJDVNXNZ5&issuer=chillerlan.net';
 
-//quick and simple:
+// quick and simple:
 echo '<img src="'.(new QRCode)->render($data).'" alt="QR Code" />';
 ```
 
@@ -79,312 +81,7 @@ echo '<img src="'.(new QRCode)->render($data).'" alt="QR Code" />';
 	<img alt="QR codes are awesome!" src="https://raw.githubusercontent.com/chillerlan/php-qrcode/main/examples/example_svg.png">
 </p>
 
-Wait, what was that? Please again, slower!
-
-### Advanced usage
-
-Ok, step by step. First you'll need a `QRCode` instance, which can be optionally invoked with a `QROptions` (or a [`SettingsContainerInterface`](https://github.com/chillerlan/php-settings-container/blob/master/src/SettingsContainerInterface.php), respectively) object as the only parameter.
-
-```php
-$options = new QROptions([
-	'version'    => 5,
-	'outputType' => QRCode::OUTPUT_MARKUP_SVG,
-	'eccLevel'   => QRCode::ECC_L,
-]);
-
-// invoke a fresh QRCode instance
-$qrcode = new QRCode($options);
-
-// and dump the output
-$qrcode->render($data);
-
-// ...with additional cache file
-$qrcode->render($data, '/path/to/file.svg');
-```
-
-In case you just want the raw QR code matrix, call `QRCode::getMatrix()` - this method is also called internally from `QRCode::render()`. See also [Custom output modules](#custom-qroutputinterface).
-
-```php
-$matrix = $qrcode->getMatrix($data);
-
-foreach($matrix->matrix() as $y => $row){
-	foreach($row as $x => $module){
-
-		// get a module's value
-		$value = $module;
-
-		// or via the matrix's getter method
-		$value = $matrix->get($x, $y);
-
-		// boolean check a module
-		if($matrix->check($x, $y)){ // if($module >> 8 > 0)
-			// do stuff, the module is dark
-		}
-		else{
-			// do other stuff, the module is light
-		}
-
-	}
-}
-```
-
-Have a look [in this folder](https://github.com/chillerlan/php-qrcode/tree/main/examples) for some more usage examples.
-
-#### Custom module values
-You can distinguish between different parts of the matrix, namely the several required patterns from the QR Code specification, and use them in different ways.
-The dark value is the module value (light) shifted by 8 bits to the left: `$value = $M_TYPE << ($bool ? 8 : 0);`, where `$M_TYPE` is one of the `QRMatrix::M_*` constants.
-You can check the value for a type explicitly like...
-```php
-// for true (dark)
-($value >> 8) === $M_TYPE;
-
-// for false (light)
-$value === $M_TYPE;
-```
-...or you can perform a loose check, ignoring the module value
-```php
-// for true
-($value >> 8) > 0;
-
-// for false
-($value >> 8) === 0;
-```
-
-See also `QRMatrix::set()`, `QRMatrix::check()` and [`QRMatrix` constants](#qrmatrix-constants).
-
-To map the values and properly render the modules for the given `QROutputInterface`, it's necessary to overwrite the default values:
-```php
-$options = new QROptions;
-
-// for HTML, SVG and ImageMagick
-$options->moduleValues = [
-	// finder
-	1536 => '#A71111', // dark (true)
-	6    => '#FFBFBF', // light (false)
-	// alignment
-	2560 => '#A70364',
-	10   => '#FFC9C9',
-	// timing
-	3072 => '#98005D',
-	12   => '#FFB8E9',
-	// format
-	3584 => '#003804',
-	14   => '#00FB12',
-	// version
-	4096 => '#650098',
-	16   => '#E0B8FF',
-	// data
-	1024 => '#4A6000',
-	4    => '#ECF9BE',
-	// darkmodule
-	512  => '#080063',
-	// separator
-	8    => '#AFBFBF',
-	// quietzone
-	18   => '#FFFFFF',
-];
-
-// for the image output types
-$options->moduleValues = [
-	512  => [0, 0, 0],
-	// ...
-];
-
-// for string/text output
-$options->moduleValues = [
-	512  => '#',
-	// ...
-];
-```
-
-#### Custom `QROutputInterface`
-Instead of bloating your code you can simply create your own output interface by extending `QROutputAbstract`. Have a look at the [built-in output modules](https://github.com/chillerlan/php-qrcode/tree/main/src/Output).
-
-```php
-class MyCustomOutput extends QROutputAbstract{
-
-	// inherited from QROutputAbstract
-	protected QRMatrix $matrix;   // QRMatrix
-	protected int $moduleCount;   // modules QRMatrix::size()
-	protected QROptions $options; // MyCustomOptions or QROptions
-	protected int $scale;         // scale factor from options
-	protected int $length;        // length of the matrix ($moduleCount * $scale)
-
-	// ...check/set default module values (abstract method, called by the constructor)
-	protected function setModuleValues():void{
-		// $this->moduleValues = ...
-	}
-
-	// QROutputInterface::dump()
-	public function dump(string $file = null):string{
-		$output = '';
-
-		for($row = 0; $row < $this->moduleCount; $row++){
-			for($col = 0; $col < $this->moduleCount; $col++){
-				$output .= (int)$this->matrix->check($col, $row);
-			}
-		}
-
-		return $output;
-	}
-
-}
-```
-
-In case you need additional settings for your output module, just extend `QROptions`...
-```
-class MyCustomOptions extends QROptions{
-	protected string $myParam = 'defaultValue';
-
-	// ...
-}
-```
-...or use the [`SettingsContainerInterface`](https://github.com/chillerlan/php-settings-container/blob/main/src/SettingsContainerInterface.php), which is the more flexible approach.
-
-```php
-trait MyCustomOptionsTrait{
-	protected string $myParam = 'defaultValue';
-
-	// ...
-}
-```
-set the options:
-```php
-$myOptions = [
-	'version'         => 5,
-	'eccLevel'        => QRCode::ECC_L,
-	'outputType'      => QRCode::OUTPUT_CUSTOM,
-	'outputInterface' => MyCustomOutput::class,
-	// your custom settings
-	'myParam'         => 'whatever value',
- ];
-
-// extends QROptions
-$myCustomOptions = new MyCustomOptions($myOptions);
-
-// using the SettingsContainerInterface
-$myCustomOptions = new class($myOptions) extends SettingsContainerAbstract{
-	use QROptionsTrait, MyCustomOptionsTrait;
-};
-
-```
-
-You can then call `QRCode` with the custom modules...
-```php
-(new QRCode($myCustomOptions))->render($data);
-```
-...or invoke the `QROutputInterface` manually.
-```php
-$qrOutputInterface = new MyCustomOutput($myCustomOptions, (new QRCode($myCustomOptions))->getMatrix($data));
-
-//dump the output, which is equivalent to QRCode::render()
-$qrOutputInterface->dump();
-```
-
-### API
-
-####  `QRCode` methods
-method | return | description
------- | ------ | -----------
-`__construct(QROptions $options = null)` | - | see [`SettingsContainerInterface`](https://github.com/chillerlan/php-settings-container/blob/main/src/SettingsContainerInterface.php)
-`render(string $data, string $file = null)` | mixed, `QROutputInterface::dump()` | renders a QR Code for the given `$data` and `QROptions`, saves `$file` optional
-`getMatrix(string $data)` | `QRMatrix` | returns a `QRMatrix` object for the given `$data` and current `QROptions`
-`initDataInterface(string $data)` | `QRDataInterface` | returns a fresh `QRDataInterface` for the given `$data`
-`isNumber(string $string)` | bool | checks if a string qualifies for `Number`
-`isAlphaNum(string $string)` | bool | checks if a string qualifies for `AlphaNum`
-`isKanji(string $string)` | bool | checks if a string qualifies for `Kanji`
-`isByte(string $string)` | bool | checks if a string is non-empty
-
-####  `QRCode` constants
-name | description
----- | -----------
-`VERSION_AUTO` | `QROptions::$version`
-`MASK_PATTERN_AUTO` | `QROptions::$maskPattern`
-`OUTPUT_MARKUP_SVG`, `OUTPUT_MARKUP_HTML` | `QROptions::$outputType` markup
-`OUTPUT_IMAGE_PNG`, `OUTPUT_IMAGE_JPG`, `OUTPUT_IMAGE_GIF` | `QROptions::$outputType` image
-`OUTPUT_STRING_JSON`, `OUTPUT_STRING_TEXT` | `QROptions::$outputType` string
-`OUTPUT_IMAGICK` | `QROptions::$outputType` ImageMagick
-`OUTPUT_FPDF` | `QROptions::$outputType` PDF, using [FPDF](https://github.com/setasign/fpdf)
-`OUTPUT_CUSTOM` | `QROptions::$outputType`, requires `QROptions::$outputInterface`
-`ECC_L`, `ECC_M`, `ECC_Q`, `ECC_H`, | ECC-Level: 7%, 15%, 25%, 30%  in `QROptions::$eccLevel`
-`DATA_NUMBER`, `DATA_ALPHANUM`, `DATA_BYTE`, `DATA_KANJI` | `QRDataInterface::$datamode`
-
-#### `QROptions` properties
-property | type | default | allowed | description
--------- | ---- | ------- | ------- | -----------
-`$version` | int | `QRCode::VERSION_AUTO` | 1...40 | the [QR Code version number](http://www.qrcode.com/en/about/version.html)
-`$versionMin` | int | 1 | 1...40 | Minimum QR version (if `$version = QRCode::VERSION_AUTO`)
-`$versionMax` | int | 40 | 1...40 | Maximum QR version (if `$version = QRCode::VERSION_AUTO`)
-`$eccLevel` | int | `QRCode::ECC_L` | `QRCode::ECC_X` | Error correct level, where X = L (7%), M (15%), Q (25%), H (30%)
-`$maskPattern` | int | `QRCode::MASK_PATTERN_AUTO` | 0...7 | Mask Pattern to use
-`$addQuietzone` | bool | `true` | - | Add a "quiet zone" (margin) according to the QR code spec
-`$quietzoneSize` | int | 4 | clamped to 0 ... `$matrixSize / 2` | Size of the quiet zone
-`$dataModeOverride` | string | `null` | `Number`, `AlphaNum`, `Kanji`, `Byte` | allows overriding the data type detection
-`$outputType` | string | `QRCode::OUTPUT_IMAGE_PNG` | `QRCode::OUTPUT_*` | built-in output type
-`$outputInterface` | string | `null` | * | FQCN of the custom `QROutputInterface` if `QROptions::$outputType` is set to `QRCode::OUTPUT_CUSTOM`
-`$cachefile` | string | `null` | * | optional cache file path
-`$eol` | string | `PHP_EOL` | * | newline string (HTML, SVG, TEXT)
-`$scale` | int | 5 | * | size of a QR code pixel (SVG, IMAGE_*), HTML -> via CSS
-`$cssClass` | string | `null` | * | a common css class
-`$svgOpacity` | float | 1.0 | 0...1 | 
-`$svgDefs` | string | * | * | anything between [`<defs>`](https://developer.mozilla.org/docs/Web/SVG/Element/defs)
-`$svgViewBoxSize` | int | `null` | * | a positive integer which defines width/height of the [viewBox attribute](https://css-tricks.com/scale-svg/#article-header-id-3)
-`$textDark` | string | '🔴' | * | string substitute for dark
-`$textLight` | string | '⭕' | * | string substitute for light
-`$markupDark` | string | '#000' | * | markup substitute for dark (CSS value)
-`$markupLight` | string | '#fff' | * | markup substitute for light (CSS value)
-`$imageBase64` | bool | `true` | - | whether to return the image data as base64 or raw like from `file_get_contents()`
-`$imageTransparent` | bool | `true` | - | toggle transparency (no jpeg support)
-`$imageTransparencyBG` | array | `[255, 255, 255]` | `[R, G, B]` | the RGB values for the transparent color, see [`imagecolortransparent()`](http://php.net/manual/function.imagecolortransparent.php)
-`$pngCompression` | int | -1 | -1 ... 9 | `imagepng()` compression level, -1 = auto
-`$jpegQuality` | int | 85 | 0 - 100 | `imagejpeg()` quality
-`$imagickFormat` | string | 'png' | * | ImageMagick output type, see `Imagick::setType()`
-`$imagickBG` | string | `null` | * | ImageMagick background color, see `ImagickPixel::__construct()`
-`$moduleValues` | array | `null` | * | Module values map, see [Custom output modules](#custom-qroutputinterface) and `QROutputInterface::DEFAULT_MODULE_VALUES`
-
-#### `QRMatrix` methods
-method | return | description
------- | ------ | -----------
-`__construct(int $version, int $eclevel)` | - | -
-`init(int $maskPattern, bool $test = null)` | `QRMatrix` | 
-`matrix()` | array | the internal matrix representation as a 2 dimensional array
-`version()` | int | the current QR Code version
-`eccLevel()` | int | current ECC level
-`maskPattern()` | int | the used mask pattern
-`size()` | int | the absoulute size of the matrix, including quiet zone (if set). `$version * 4 + 17 + 2 * $quietzone`
-`get(int $x, int $y)` | int | returns the value of the module
-`set(int $x, int $y, bool $value, int $M_TYPE)` | `QRMatrix` | sets the `$M_TYPE` value for the module
-`check(int $x, int $y)` | bool | checks whether a module is true (dark) or false (light)
-
-#### `QRMatrix` constants
-name | light (false) | dark (true) | description
----- | ------------- | ----------- | -----------
-`M_NULL` | 0 | - | module not set (should never appear. if so, there's an error)
-`M_DARKMODULE` | - | 512 | once per matrix at `$xy = [8, 4 * $version + 9]`
-`M_DATA` | 4 | 1024 | the actual encoded data
-`M_FINDER` | 6 | 1536 | the 7x7 finder patterns
-`M_SEPARATOR` | 8 | - | separator lines around the finder patterns
-`M_ALIGNMENT` | 10 | 2560 | the 5x5 alignment patterns
-`M_TIMING` | 12 | 3072 | the timing pattern lines
-`M_FORMAT` | 14 | 3584 | format information pattern
-`M_VERSION` | 16 | 4096 | version information pattern
-`M_QUIETZONE` | 18 | - | margin around the QR Code
-`M_LOGO` | 20 | - | space for a logo image (not used yet)
-`M_TEST` | 255 | 65280 | test value
-
-
-### Notes
-The QR encoder, especially the subroutines for mask pattern testing, can cause high CPU load on increased matrix size.
-You can avoid a part of this load by choosing a fast output module, like `OUTPUT_IMAGE_*` and setting the mask pattern manually (which may result in unreadable QR Codes).
-Oh hey and don't forget to sanitize any user input!
-
-### Disclaimer!
-I don't take responsibility for molten CPUs, misled applications, failed log-ins etc.. Use at your own risk!
-
-#### Trademark Notice
-
-The word "QR Code" is registered trademark of *DENSO WAVE INCORPORATED*<br>
-http://www.denso-wave.com/qrcode/faqpatent-e.html
+Wait, what was that? Please again, slower! See [Advanced usage](https://github.com/chillerlan/php-qrcode/wiki/Advanced-usage) on the wiki.
 
 ### Framework Integration
 - Drupal [Google Authenticator Login `ga_login`](https://www.drupal.org/project/ga_login)
@@ -394,10 +91,17 @@ http://www.denso-wave.com/qrcode/faqpatent-e.html
 - [Cachet](https://github.com/CachetHQ/Cachet)
 - other uses: [dependents](https://github.com/chillerlan/php-qrcode/network/dependents) / [packages](https://github.com/chillerlan/php-qrcode/network/dependents?dependent_type=PACKAGE)
 
-
+### Shameless advertising
 Hi, please check out my other projects that are way cooler than qrcodes!
 
 - [php-oauth-core](https://github.com/chillerlan/php-oauth-core) - an OAuth 1/2 client library along with a bunch of [providers](https://github.com/chillerlan/php-oauth-providers)
 - [php-httpinterface](https://github.com/chillerlan/php-httpinterface) - a PSR-7/15/17/18 implemetation
 - [php-database](https://github.com/chillerlan/php-database) - a database client & querybuilder for MySQL, Postgres, SQLite, MSSQL, Firebird
 
+### Disclaimer!
+I don't take responsibility for molten CPUs, misled applications, failed log-ins etc.. Use at your own risk!
+
+#### Trademark Notice
+
+The word "QR Code" is registered trademark of *DENSO WAVE INCORPORATED*<br>
+http://www.denso-wave.com/qrcode/faqpatent-e.html