There are two ways to publish the changes we've made. One is to publish the entire project (the Offline project, in this case). This will copy all of the changes in the current project to the Online project. To do this, simply press the Publish icon in the main toolbar. If any resources are locked, you will be prompted to allow OpenCms to release all locks. Choosing Ok will automatically remove all of the locks and then continue the publishing process:

You may want to publish only a small set of changed files rather than the whole project. To do this, left-click on the icon next to the resource you wish to publish and select Publish directly. Note that this option will be marked inactive if you have a lock on the file or the file has not been changed since the last time it was published. A file must be unlocked before it can be published directly. Try publishing the /playground/ directory directly. That will publish the folder as well as all of its contents. After...