Web and Phone sites

[Egg Bramhill]

In Xara select the Google Maps Placeholder.
Right click & select Website Variants / Share with all Variants
You'll get the following warning from Xara (see screengrab below)
Select Copy
On the variant page reduce this copy down to 480px (or whatever your mobile variants width is)
Note the W & H
Right click & select Edit Widget
Change the placeholder code to match the width & height note above.
Apply

[Egg Bramhill]

Here's an example: