# SpecTcl Tutorial - part 15

By selecting the column handle (click on it - it will turn red) we can click again to toggle its resize behavior, making it a resizable column. Notice the ends of the column indicator have changed to arrow heads.

Since we have already configured the frame to fill its entire cavity, the second column, now resizable, fills up the previously unoccupied space in the cavity.

Notice that the columns on the first row are disjoint from those on the second row.

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