Another useful feature is a bunch of pre-designed layouts and dynamic switching between them.
To learn more about the framework see the [baseimage-tutorial-framework](https://github.com/avatao-content/baseimage-tutorial-framework) repo.
For more on creating, building and running TFW-based tutorials (not just the frontend) consult [test-tutorial-framework](https://github.com/avatao-content/test-tutorial-framework).
These APIs are documented in the `baseimage-tutorial-framework` repository as docstrings in the [lib/tfw/components](https://github.com/avatao-content/baseimage-tutorial-framework/tree/master/lib/tfw/components) directory (this is where the implementations of our pre-written event handlers live).
Most of the time it is not necessary to edit the source code of our components as you can easily customise their behaviour through the `src/app/config.ts` config file.
The most notable setting available in this file is the enabling of different layouts the user and you can switch between.
Layouts describe which components are visible and where they are on the screen.
The IDE automatically saves any changes made to the files (the interval is configurable).
It connects to an `IdeEventHandler` instance on the backend which handles the reading/writing of files and the selection of directories as well.
It is also capable of dynamically displaying any changes made to these files from the terminal or any other process (this means that you always see a live view of the files).
Note that setting up a custom server is documented in the [test-tutorial-framework](https://github.com/avatao-content/test-tutorial-framework) repo.
Alternatively you can create your own Angular component(s) in `src/app/web`.
Just rewrite `WebComponent` as you please or even nest more components into it if needed.
Note that you must set `config.dashboard.iframeUrl` to an empty string(`''`) to enable the displaying of `WebComponent` (this also disables `iframe`ing).
The dashboard also exposes a frontend API to dynamically change layouts any time using a message format as such (note that the layout you switch to must be enabled):