Remove white space at header area

Hi there,
Is there a way to remove the white space at the top of each page content. I am presuming this is where the header may be, so I tried the solution you gave another user. I would like the written content to appear a little higher - eg on this page http://pilsondental.com/invisalign/
Thanks in advance!

Hello there,

I hope you are doing well today.

You can use the following CSS code to change the padding for the title by going to Appearance > Customize > Additional CSS and pasting it there.

/*Padding for the title*/
header#masthead {
    margin-bottom: 10px;
}

Best Regards,
Support

Great thanks!

Hello there,

I am glad the solution worked for you.
Please feel free to contact us again in the future regarding any other issues.

Best Regards,
Support