Hi,
You can do this with LabTalk script such as pasted below. To execute this script, make your worksheet the active page (by clicking and selecting it), then open the Script Window (menu item: Window->Script Window), then copy and paste all lines of code from below, select/highlight all the lines in the script window, and press Enter.
Easwar
OriginLab
// get number of columns in wks
numcols=wks.ncols;
// loop over all columns
for( i = 1; i <= numcols; i++ )
{
// get stats on col
sum( %( %h, i ) );
// divide col by max value
%( %h, i ) /= sum.max;
}