# Extensions Extensions are simply a way for custom code to be run after loading elements and skins. Simply place a `.lua` file in the `extensions` directory, and it will be required. ## Standard Extensions There is only one standard extension, which modifies element classes to add a more convenient getter/setter method to most get/set methods. For example, instead of `element:getSize()`, just call `element:size()`. Instead of `element:setSize(w, h)`, call `element:size(w, h)`. This is mostly for a demo of what can be possible, but also might be useful.