Right-click and select Select label to change the attribute and its associated label in the same action.

or

Drag selected item(s) to a new position.

or

Place the cursor, which displays as a double-headed arrow, over one of the sizing handles and drag to increase or decrease the size of the item(s).

or

Right-click an item and select Properties to configure or modify the properties of an attribute.

or

Click one of the icons on the toolbar to either change the size and/or position of the item(s), or change the order in which the cursor moves from item to item, for text entry, when the <Tab> key is pressed (tab order).