Overview
This is a record of investigating how to customize LEAF Writer.
https://gitlab.com/calincs/cwrc/leaf-writer/leaf-writer
This time, it is a memo on how to add sample data. We add custom sample data as shown below.

Method
Please refer to the following.
https://gitlab.com/nakamura196/leaf-writer/-/commit/c4e98090c94874037980819c9672eea10814eedb
In addition to updating samples.json, it was also necessary to update apps/commons/src/icons/index.tsx to add an icon, although this is not mandatory.
Result
As shown below, the editor environment could be opened from the sample data.

Summary
I hope this serves as a helpful reference for understanding LEAF Writer.