Masonry panel integration


I wanted to know how you manage to offer the customer a grid system to use Masonry simply? I mean, how to allow the user to update a grid by modifying the width of the blocks, and especially to have a direct preview in the panel to facilitate the update?
What kind of fields do you recommend in this specific case? Layout field ? Structure field ?


In the panel? I think there is currently no solution for this. Blocks would be good to use with an individual block preview.