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Writing playground based tutorials (PBTs) just got easier. Well a little bit easier than when it started in this thread. There are now methods available in the playground for anyone to highlight or hide lines in the editor and to build simple standard information and selection dialogue boxes. Documentation is available to describe the available functions with links to a couple of examples and how they were coded. Even if you do not want to write a full tutorial the functions can be used just to highlight some lines in your code or even to hide and unhide some lines as in this example https://www.babylonjs-playground.com/#NLMGJ2 A word of warning - I thought that this example was simple enough so I ignored my own advice from the documentation and just added the function to hide code straight into the playground and forgot to change a true to a false and ended up losing the code I needed to correct. So unless you are just using line decoration always write and edit the code in a text editor and copy and paste into a PG and Run to test, don't Save until you are sure everything is correct..