It is possible to provide a CSS file to be used regardless of the theme set by the user.

	Start by creating a new note and changing the note type to CSS
	In the ribbon, press the “Owned Attributes” section and type #appCss.
	Type the desired CSS. Generally it's a good idea to append !important for the styles that are being changed, in order to prevent other

Seeing the changes

Adding a new app CSS note or modifying an existing one does not immediately apply changes. To see the changes, press Ctrl+Shift+R to refresh the page first.

Example use-case: customizing the printing stylesheet

When printing a document or exporting as PDF, it is possible to adjust the style by creating a CSS note that uses the @media selector.

For example, to change the font of the document from the one defined by the theme or the user to a serif one:

@media print {

	body {

        --main-font-family: serif !important;

        --detail-font-family: var(--main-font-family) !important;

    }

}