LPub3D - page layout on multistep pages

[Jetro de Château]

I've run into a problem with this procedure with milti-step pages in submodels. The submodel appears to inherit both the placement of the group (PLIs + models, fine with me as I want to keep things aligned in the same way) and the assembly margin. Whatever I try the pop-up for assembly margin in a submodel always open at 0.00 even if I change it previously. The code is inserted in the page, but disregarded. I have tried negative numbers to see if that would reduce the inherited assembly margin, but that results in an error.