material ui default body font size code example

Example 1: change font of all material ui typography

const theme = createMuiTheme({
  typography: {
    fontFamily: 'Raleway, Arial',
  },
  overrides: {
    MuiCssBaseline: {
      '@global': {
        '@font-face': [raleway],
      },
    },
  },
});

// ...
return (
  <ThemeProvider theme={theme}>
    <CssBaseline />
    {children}
  </ThemeProvider>
);

Example 2: how to change the font size of a uilabel

label.font = label.font.withSize(20)