Bubble 1.0 Plain Text Comic Book Script Editor Screencast
The original version of Bubble, based on an easy to learn plain text markup, is still available. If you can type or write a text message, you can format your script to industry standard using Bubble.
Bubble Retro remains simple to use, will never use proprietary file formats, and does not require you to register or log in. You can write your scripts in any text editor you chose and then upload to Bubble or use the online editor to create, save, and reload your scripts.