when i use package array to get thick vertical lines i write for example in the alignmentfield of the first cell |c!{\vrule width 3pt}p{5cm}|r| which should give three colums center - 5cm width - right and with the vertical lines thin - thick - thin - thin Jürgen, if i understand well, than this definitions in the alignment-field overwrites the defaults! but this works not for the first and last vertical lines. if the button in the table menu is set, i get double lines, means thin/thin - thick - thin - thin/thin Herbert -- http://www.educat.hu-berlin.de/~voss/lyx/