Rhino 8; Import Layout Command, need to have a group or lasso select. Going through and unselecting each layout is border line torture.
I modified your topic title so it is more informative. I hope that’s ok.
Actually, have you tried right clicking a layout in the popup panel? It selects only the one you clicked on. Then you can select multiple layouts by holding LMB and dragging over the checkmark boxes.
I find a bit inconsistent that a right click selects a layout by clicking either the box or layout name however left mouse clicks have to be in the box. Nothing useful happens with a LMB click on the layout name.