update readme for dompdf setoptions function

Author: Hans VN

readme.md

@@ -58,6 +58,45 @@ If you need the output as a string, you can get the rendered PDF with the output
 Use `php artisan vendor:publish` to create a config file located at `config/dompdf.php` which will allow you to define local configurations to change some settings (default paper etc).
 You can also use your ConfigProvider to set certain keys.
 
+### Configuration
+The defaults configuration settings are set in `config/dompdf.php`. Copy this file to your own config directory to modify the values. You can publish the config using this command:
+
+    php artisan vendor:publish --provider="Barryvdh\DomPDF\ServiceProvider"
+
+You can still alter the dompdf options in your code before generating the pdf using this command:
+
+    PDF::setOptions(['dpi' => 150, 'defaultFont' => 'sans-serif']);
+    
+Available options and their defaults:
+* __rootDir__: "{app_directory}/vendor/dompdf/dompdf"
+* __tempDir__: "/tmp" _(available in config/dompdf.php)_
+* __fontDir__: "{app_directory}/storage/fonts/" _(available in config/dompdf.php)_
+* __fontCache__: "{app_directory}/storage/fonts/" _(available in config/dompdf.php)_
+* __chroot__: "{app_directory}" _(available in config/dompdf.php)_
+* __logOutputFile__: "/tmp/log.htm"
+* __defaultMediaType__: "screen" _(available in config/dompdf.php)_
+* __defaultPaperSize__: "a4" _(available in config/dompdf.php)_
+* __defaultFont__: "serif" _(available in config/dompdf.php)_
+* __dpi__: 96 _(available in config/dompdf.php)_
+* __fontHeightRatio__: 1.1 _(available in config/dompdf.php)_
+* __isPhpEnabled__: false _(available in config/dompdf.php)_
+* __isRemoteEnabled__: true _(available in config/dompdf.php)_
+* __isJavascriptEnabled__: true _(available in config/dompdf.php)_
+* __isHtml5ParserEnabled__: false _(available in config/dompdf.php)_
+* __isFontSubsettingEnabled__: false _(available in config/dompdf.php)_
+* __debugPng__: false
+* __debugKeepTemp__: false
+* __debugCss__: false
+* __debugLayout__: false
+* __debugLayoutLines__: true
+* __debugLayoutBlocks__: true
+* __debugLayoutInline__: true
+* __debugLayoutPaddingBox__: true
+* __pdfBackend__: "CPDF" _(available in config/dompdf.php)_
+* __pdflibLicense__: ""
+* __adminUsername__: "user"
+* __adminPassword__: "password"
+
 ### Tip: UTF-8 support
 In your templates, set the UTF-8 Metatag: