Is there other way to minimize multiple selection like attached?

1. Which control is used for multiple selection?
2. How do I add multiple selection list boxes?

Which control is used for multiple selection?

To select multiple options, hold down the Control (Ctrl) key if you are using a PC system or the Apple key if you are using a Macintosh system, while you click on the several options that you wish to select.

How do I add multiple selection list boxes?

Under Insert controls, click Multiple-Selection List Box. If you cleared the Automatically create data source check box in step 3, select a repeating field in the Multiple-Selection List Box Binding dialog box to which you want to bind the multiple-selection list box.