Improve thumbnail quality of customized product

It would be great to use bigger/more quality images of customized product's thumbnail in admin. 

Because details are absolutely not recognizable. If you have the same products in order or more orders with the same products, you can not know which is which and you need open each in product builder which is annoying.

Or if you are using printed order lists, details are not visible also on the paper.

Proposal:

Possibility to have option to set bigger screen resolution (ppi/dpi) / quality of image somewhere in the settings of FPD.