When editing labels you often have multiple lines of parameters. Some of these need to go in the same row, others need a line break. Right now (ok, ok, r2025) every parameter added has its own linebreak tick mark. Or rather has not until you click it. It propose to link these to the rows of the label and not the parameter that instigated them. That way standard room tag consisting of number, name, area, circumference, ceiling, wall and floor finishings would retain their line breaks if some project lead wanted the finishes to come before the area.