Just answer it myself : I thought of the checkboxes in front of the attributes as boolean. However, it has to to with the browse feature filtered browsing =1= In this way you can, when checking one of the checkboxes, browse to the same item clicking the next and previous button. Sorry , my question was about RTFM ( Read The Fucking Manual ) So this question is solved.

However , it would be nice to have a checkbox in front of one attribute. Suppose you have a lot a entries in a record ,that are readonly( predefined). The user of the form must only confirm that a job is done by checking the checkbox without going to the edit mode. So, the checkbox is writable in readonly mode. I can inmagine something like : attribute record check = attribute in the configuration file. In this way the user of the form says : job done. There can be only one checkbox for the record.

[ job done]  [ customer ] [ activity ] [ What should be done ]
[X]           BLA          Check job1   Backup mail check
[]            BLA1         Check job2   check error report
[X]           Bla2         Check job3   check MQ jobs

Thanks for your reading this

void show_bottom_text(LOGBOOK * lbs)
{
   char str[NAME_LENGTH], slist[20][NAME_LENGTH], svalue[20][NAME_LENGTH];
   int i, size;

   if (getcfg(lbs->name, "bottom text", str, sizeof(str))) {
      FILE *f;
      char file_name[256], *buf;

      if (str[0]) {
         /* check if file starts with an absolute directory */
         if (str[0] == DIR_SEPARATOR || str[1] == ':')
            strcpy(file_name, str);
         else {
            strlcpy(file_name, logbook_dir, sizeof(file_name));
            strlcat(file_name, str, sizeof(file_name));
         }