1### Creating Custom Skins 2 31. Create a folder like this (recommended name: 'src/skin-custom-...') 42. For a start, copy files from one of the existing skin folders (src/skin-...) 5 to the custom folder: 6 - ui.fancytree.less (required) 7 - icons.gif (if needed) 8 - loading.gif (if needed) 93. cd to your fancytree folder and run `grunt dev` from the console.<br> 10 Note: NPM and Grunt are required. 11 Read [how to install the toolset](https://github.com/mar10/fancytree/wiki/HowtoContribute#install-the-source-code-and-tools-for-debugging-and-contributing). 124. Edit and save your ui.fancytree.less file.<br> 13 The `ui.fancytree.css` will be generated and updated automatically from 14 the LESS file. 15