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Darin Hawley's avatar
Darin Hawley
Copper Contributor
Jan 03, 2017

How do I change the default font size for wiki pages in SharePoint Online?

The default font size for wiki pages in SharePoint Online seems much too small. How do I change this? Will it affect the entire tenant, or can it be localized to one site collection or sub-site? Than...
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Darin Hawley's avatar
Darin Hawley
Copper Contributor
Jan 03, 2017

If there is a CSS file somewhere that could be modified to solve the problem, perfect. Again, would prefer not having to touch every wiki page to make this work. I think I located what you were talking about at Site Settings > Master Pages. From there I see a list of files...

 

__DeviceChannelMappings.aspx
minimal.master
oslo.master
oslo.preview
seattle.master
seattle.preview
v4.master

 

I'm using Seattle theme, and if I Edit Properties for that file I see a field labeled "Default CSS File" with a value of "corev15app.css". I assume I would need to modify that CSS file, or provide an alternate value, but I'm not sure where the CSS file is located or whether updating the value here would have the intended effect. Will I need to edit a master page? If so, what is the scope of pages impacted? I've been told editing master page is a no-no, and not allowed by our admin. 

 

Pieter Veenstra's avatar
Pieter Veenstra
MVP
Jan 03, 2017
You would need to create a custom css which just includes the class responsible for the text inside the wiki zone. The existing files should indeed not be modified.
If you need help with this I can have a look at this tomorrow. I am currently not near a pc.
  • Pieter Veenstra's avatar
    Pieter Veenstra
    MVP
    Jan 04, 2017

    you could create a custom.css file with the following content:

     

    #ctl00_PlaceHolderMain_PageContent__ControlWrapper_RichHtmlField
{
   font-size: 20px;
}

     

    Store this css file anywhere wihtin the site collection in sharepoint where everybody has access.

     

    Then within the location mentioned above reference this css file.

     

     

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