Create a drop-down list - Microsoft Support
You can insert a drop-down list of valid entries (also called a drop-down menu or drop-down box) in Excel to make data entry easier, or to limit entries to certain items that you define.
Add or remove items from a drop-down list - Microsoft Support
Add or remove items from an existing drop-down list (also called a drop-down menu or drop-down box).
Video: Manage drop-down lists - Microsoft Support
Create a drop-down list. Add or remove items from a drop-down list. Remove a drop-down list. Lock cells to protect them
Insert a multiple-selection list box - Microsoft Support
Drop-down list box Like any other list, a drop-down list box offers users a list of choices. However, with drop-down list boxes, the list entries are hidden until the user clicks the control. Users can select only one item from a drop-down list.
Insert a drop-down list box - Microsoft Support
You can use a drop-down list box in a Microsoft Office InfoPath form template to present a list of mutually exclusive choices to a user. The list is hidden until the user clicks the arrow to the right of the drop-down list.
Create a cascading list box - Microsoft Support
Under Insert controls in the Controls task pane, click Drop-Down List Box. When a user fills out a form that is based on your form template, the selection in this drop-down list box will determine the choices that are available in the second list box.
Menu Shapes - Microsoft Support
Drop-down menu item. New, Open, and Save As are examples of drop-down menu items. They are connected to each other to create a column of commands when the user clicks the top-level menu item. All of the Drop-down menu item shapes in a column should be the width of the widest one. Right-click a Drop-down menu item shape to see the following ...
Remove a drop-down list - Microsoft Support
To remove a drop-down list, click the cell with the list, then click Data > Data Validation, and then on the Settings tab, click Clear All, then OK. A drop-down list is also known as a drop-down box or drop-down menu.
Add a list box or combo box to a worksheet in Excel
Add a list box to your Excel worksheet from which users can choose a value. Make data entry easier by letting users choose a value from a combo box. A combo box combines a text box with a list box to create a drop-down list.
Add a list box or combo box - Microsoft Support
1. Click the arrow to display the drop-down list. 2. Click an option in the drop-down list. List boxes and combo boxes can be bound or unbound controls. These controls can look up values in a fixed list that you type yourself, or they can look up values in a table or query.