Pre Made Themes Created by Google
At the right, click Themes.
Under "Created by Google," select a pre-made theme.
Custom Theme
Firstly:
On the right panel, click Themes.
Under "Custom," select the Create Theme Plus sign.
Enter a name for your theme.
You can also add a logo and banner image.
Select Next.
Secondly:
Select a color palette from the Present Colours.
To choose specific colors for different parts of your site, select Custom colors.
Then select Next.
Finally:
Choose your fonts.
Select Create theme.
Import a Theme
At the right, click Themes.
Under "Custom," select Import theme .
Select any site and then Select a theme.
Click Import theme.
Header Types
Point to the header and click Header type.
Choose a size for the header - cover, banner, large banner, title only.
To publish your changes, at the top right, click Publish.
Replace Header Image
Point to the header and click Change image.
Click Upload or Select image.
Upload or choose an image and click Open or Select from the Gallery, By URL, Search (Google), Your albums, or Google Drive.
To publish your changes, at the top right, click Publish
Custom Headers
Custom Headers can be created with Google Drawing or a platform like Canva then uploaded.
For a Banner Header use a Drawing sized to 366 x 400 pixels.
For a Large Banner use a Drawing sized to 1366 x 768 pixels.
Remember to use your own images or images that are free or you have the rights to use. Try pixabay or unsplash for free to use images.