You can add a documentation component to existing elements as well:
npxreactiumtoolkitdocument
[ARCLI] > Document Name: Documentation[ARCLI] > Document ID: docs[ARCLI] > Directory: /My Reactium Project/src/app/components/Toolkit/Test/Documentation[ARCLI] > Sidebar?: Yes[ARCLI] > Sidebar Group ID (optional): test[ARCLI] > Sidebar Label: Test Documentation[ARCLI] > Sidebar URL?: Yes[ARCLI] > Sidebar Order: 100[ARCLI] > A new toolkit document will be created using the following configuration:{"name":"Documentation","id":"readme","directory":"/My Reactium Project/src/app/components/Toolkit/Test/Documentation/Documentation","sidebar":true,"group":"test","label":"Test Documentation","url":"/toolkit/test/readme","order":100}[ARCLI] > Proceed?: (y/N)
You can then open the generated readme.md file and use markdown text to document an element.