For our web sites, I believe this can be configured from the following path:

studio/module.php?name=bx_developer under the Editor section.

Relevant options include:

• Quill – allow empty tags
• Quill – allowed formats for mini/standard/full editor
• Quill buttons for mini editor:

['bold','italic','underline','clean',{'list':'ordered'}, {'list':'bullet'},{ 'align':''},{'align':'center'},{'align':'right'},'blockquote','link','image','embed']

• Quill buttons for standard editor:

['bold','italic','underline','clean',{ 'header': [1, 2, 3, 4, 5, 6, false] },{'list':'ordered'}, {'list':'bullet'},{'indent': '-1'},{'indent': '+1'},{ 'align':''},{'align':'center'},{'align':'right'},{'align':'justify'},'blockquote','link','image','embed','emoji']

• Quill buttons for full editor:

[{ 'header': [1, 2, 3, 4, 5, 6, false] },'bold','italic','underline','clean'],
[{ 'align': [] },{'list':'ordered'}, {'list':'bullet'},{'indent': '-1'},{'indent': '+1'},'blockquote',
{ 'color': [] }, { 'background': [] },{ 'direction': 'rtl' },'link','image','embed','code-block','emoji','show-html']

I will investigate the issue concerning user permissions for the editor and inform you of any updates. Let me know if you've figured out how to make the correct settings.