Allow grid selection instead of free selection

[Lambik]

Hi,

The feature I like a lot in another service Field Papers is that you can select "I want a grid of x by y pages". With your service, I crop on the map and I have to see what I can get (using "multiple pages" layout, of course).

Of course your solution works fine, but I have a specific use case where I want to create a grid of 3x6 pages, and see what I can include or not (to print them and tape them together to make a large overview).

I fully realise that this is practically impossible in your setup, since the page size selection happens very late in the wizard, but please think about it?

Thanks!