You have some columns in your Klip that you want hidden, unless the user un-hides them.

In the style definition for the column, add hidden: true:

title {
    itemcol: 1;
    label: "Title";
}
author {
    itemcol: 2;
    label: "Author";
    hidden: true;
}
date {
    itemcol: 3;
    label: "Date Posted";
}

In the above example, initially only the "title" and "date" columns would be shown to the user. The user would still be able to right-click on the Klip's column headers and un-hide the column if they wanted to see the "author" column.