Since OOo does not provide the feature of inserting diagonal table header, the
user will meet the following problems  when they use drawing tool to draw
diagonal line in the cells to achieve that feature, the diagonal line won't be
changed if the size of the cell changes, if the client wanna input word at the
part of diagonal line he  can only do so by using self chosen text frame to
input word which will be very inconvenient, so we can meet user's need by
inserting diagonal line table header that is to  combine   inserting diagonal
line with inputing word to fulfill the function of inserting diagonal line table
header, we can add "insert diagonal line table header " menu item in the main
menu “Insert" and at the same time we can build a box called" inserting clined
line table header". the box of " inserting clined line table header is used to
provide the customer with the function of choosing clined line table header
format, inputing word and choosing the font size of the word.