Canvas Board - change the column widths

[Warren Carley]

Confluence : Server Version 6.12.2

Canvas Board Macro

I want to create a board that we can place in my page space

The board will be public, have two columns and encourage people to share their feature ideas for two of our services.

I have used Canvas Board macro and removed the excess columns but now I am unable to get the two columns of cards to extend to the width of the page: 

I can find no way to access the DIV or container styling to adjust the container width.

Is there a way to change the board's column width?

Thanks,

W.