Do you want to completely remove the header of your site? Some CSS tweaks in Canvas can help you how to do it. Please refer below

Canvas theme
Canvas Child theme

Step 1 Login to WordPress control panel

Step 2 Provided that you have already uploaded a Canvas Child folder containing style.css and functions.php files in the themes folder using FTP. Go to Appearance > Editor

Step 3 Enter the following codes in Canvas Child style.css file.

Theme Name: Canvas Child
Theme URI:
Description: Child theme for the Canvas theme
Author: Jezweb
Author URI:
Template: canvas
Version: 0.1.0

@import url(“../canvas/style.css”);

#header {
display: none;

note: We are using a Canvas child theme so that your CSS settings will not be changed if there is an update with the main canvas theme.

Step 4 Click Update File and go to your online site. You should no longer see the header on your page.