I don't think you should have a # in front of the i

also you need to change this (it removes i)

-em/-i[class|style]

to

-em[class|style]

I changed as you proposed, but it still removes the i-Tag in my RTE. :(

I will test in my v9 later and let you know how I get on, but that certainly works in v8

Yes. In v8 I never had this kind of problems. :)

For for the protocol: i did the changes in this file:

./umbraco/config/appsettings-schema.json

Thanks for your support!

I think your declaration is incorrect, I think you should be doing this

  "RichTextEditor": {
    "ValidElements": "+a[id|style|rel|data-id|data-udi|rev|charset|hreflang|dir|lang|tabindex|accesskey|type|name|href|target|title|class|onfocus|onblur|onclick|ondblclick|onmousedown|onmouseup|onmouseover|onmousemove|onmouseout|onkeypress|onkeydown|onkeyup],-strong/-b[class|style],-em[class|style],-strike[class|style],-u[class|style],#p[id|style|dir|class|align],-ol[class|reversed|start|style|type],-ul[class|style],-li[class|style],br[class],img[id|dir|lang|longdesc|usemap|style|class|src|onmouseover|onmouseout|border|alt=|title|hspace|vspace|width|height|align|umbracoorgwidth|umbracoorgheight|onresize|onresizestart|onresizeend|rel|data-id],-sub[style|class],-sup[style|class],-blockquote[dir|style|class],-table[border=0|cellspacing|cellpadding|width|height|class|align|summary|style|dir|id|lang|bgcolor|background|bordercolor],-tr[id|lang|dir|class|rowspan|width|height|align|valign|style|bgcolor|background|bordercolor],tbody[id|class],thead[id|class],tfoot[id|class],#td[id|lang|dir|class|colspan|rowspan|width|height|align|valign|style|bgcolor|background|bordercolor|scope],-th[id|lang|dir|class|colspan|rowspan|width|height|align|valign|style|scope],caption[id|lang|dir|class|style],-div[id|dir|class|align|style],-span[class|align|style],-pre[class|align|style],address[class|align|style],-h1[id|dir|class|align|style],-h2[id|dir|class|align|style],-h3[id|dir|class|align|style],-h4[id|dir|class|align|style],-h5[id|dir|class|align|style],-h6[id|style|dir|class|align|style],hr[class|style],small[class|style],dd[id|class|title|style|dir|lang],dl[id|class|title|style|dir|lang],dt[id|class|title|style|dir|lang],object[class|id|width|height|codebase|*],param[name|value|_value|class],embed[type|width|height|src|class|*],map[name|class],area[shape|coords|href|alt|target|class],bdo[class],button[class],iframe[*],i[class|style]"
  }

The configuration happens in this block:

"UmbracoCmsCoreConfigurationModelsRichTextEditorSettings": {
  "type": "object",
  "properties": {
    "Commands": {
      "type": "array",
      "description": "HTML RichText Editor TinyMCE Commands",
      "items": {
        "$ref": "#/definitions/UmbracoCmsCoreConfigurationModelsRichTextEditorCommand"
      }
    },
    "Plugins": {
      "type": "array",
      "description": "HTML RichText Editor TinyMCE Plugins",
      "items": {
        "type": "string"
      }
    },
    "CustomConfig": {
      "type": "object",
      "description": "HTML RichText Editor TinyMCE Custom Config",
      "additionalProperties": {
        "type": "string"
      }
    },
    "ValidElements": {
      "type": "string",
      "description": " ",
      "default": "+a[id|style|rel|data-id|data-udi|rev|charset|hreflang|dir|lang|tabindex|accesskey|type|name|href|target|title|class|onfocus|onblur|onclick|ondblclick|onmousedown|onmouseup|onmouseover|onmousemove|onmouseout|onkeypress|onkeydown|onkeyup],-strong/-b[class|style],-em[class|style],-strike[class|style],-u[class|style],#p[id|style|dir|class|align],-ol[class|reversed|start|style|type],-ul[class|style],-li[class|style],br[class],img[id|dir|lang|longdesc|usemap|style|class|src|onmouseover|onmouseout|border|alt=|title|hspace|vspace|width|height|align|umbracoorgwidth|umbracoorgheight|onresize|onresizestart|onresizeend|rel|data-id],-sub[style|class],-sup[style|class],-blockquote[dir|style|class],-table[border=0|cellspacing|cellpadding|width|height|class|align|summary|style|dir|id|lang|bgcolor|background|bordercolor],-tr[id|lang|dir|class|rowspan|width|height|align|valign|style|bgcolor|background|bordercolor],tbody[id|class],thead[id|class],tfoot[id|class],#td[id|lang|dir|class|colspan|rowspan|width|height|align|valign|style|bgcolor|background|bordercolor|scope],-th[id|lang|dir|class|colspan|rowspan|width|height|align|valign|style|scope],caption[id|lang|dir|class|style],-div[id|dir|class|align|style],-span[class|align|style],-pre[class|align|style],address[class|align|style],-h1[id|dir|class|align|style],-h2[id|dir|class|align|style],-h3[id|dir|class|align|style],-h4[id|dir|class|align|style],-h5[id|dir|class|align|style],-h6[id|style|dir|class|align|style],hr[class|style],small[class|style],dd[id|class|title|style|dir|lang],dl[id|class|title|style|dir|lang],dt[id|class|title|style|dir|lang],object[class|id|width|height|codebase|*],param[name|value|_value|class],embed[type|width|height|src|class|*],map[name|class],area[shape|coords|href|alt|target|class],bdo[class],button[class],iframe[*],i[class|style]"
    },
    "InvalidElements": {
      "type": "string",
      "description": "Invalid HTML elements for RichText Editor",
      "default": "font"
    }
  }
},

I just installed latest v9.4.0 and tried it, doesn't appear to work as you have discovered.

on further checking, perhaps this is not the place for this, I noticed that every time I run the website in Visual studio the appsettings-schema.json gets over written removing my changes.

Yes, I noticed that too. So I did my changes on the deployed version on our server. Restarting the web to take effect of the changes. But it did not work either.

You hit it! Thanks a lot!

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