Configure the TinyMCE editor

You can extend and fully customize the TinyMCE editor to match the style and look-and-feel of your custom theme. This enables richer content editing capabilities and ensures that content created in the Page Builder WYSIWYG is seamlessly integrated and consistent with your other content.

Edit the module’s di.xml file

Revise the di.xml file, adding the configuration settings as an argument to Magento\PageBuilder\Model\Wysiwyg\DefaultConfigProvider, to customize the TinyMCE editor present in Page Builder.

The following code shows an example of configuration settings in the di.xml file that determine the font sizes available for selection and add a paragraph menu option associated with the <p> tag:

<type name="Magento\PageBuilder\Model\Wysiwyg\DefaultConfigProvider">
        <argument name="additionalSettings" xsi:type="array">
            <item name="fontsize_formats" xsi:type="string">10px 12px 14px 16px 18px 20px 24px 26px 28px 32px 34px 36px 38px 40px 42px 48px 52px 56px 64px 72px</item>
            <item name="style_formats" xsi:type="array">
                <item name="paragraph" xsi:type="array">
                    <item name="title" xsi:type="string">Paragraph</item>
                    <item name="block" xsi:type="string">p</item>

See a list of possibly TinyMCE settings on their website.

Once you have edited the di.xml file you can apply custom styling for the settings you implemented in the related CSS file.