The row boundary,the border at the top of a row,can be dragged until the column is at the desired width.

Row Boundary

The line that delineates the end of one row and the beginning of another in a spreadsheet or table, often adjustable to change row height.

Column

A vertical sequence of cells in a spreadsheet or table.

Desired Width

The specific or preferred width dimension that a user or application sets for an object or document layout.