In Excel for the web, you can only edit a drop-down list where the source data has been entered manually. If the Source box contains drop-down entries separated by commas, then type new entries …

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.

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 …

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 …

In a column of a worksheet, type the values to sort by. Arrange them in the order that you want to define the sort order—from top to bottom. For example: Select all of the cells in that list, and then click File …

Use data validation rules to control the type of data or the values that users enter into a cell. One example of validation is a drop-down list (also called a drop-down box or drop-down menu). Watch …

Select the circle next to the item you want to edit, right click, and then select in the dropdown. If you want to edit multiple items, select the circle for both items.

Content controls include things like check boxes, text boxes, and drop-down lists. If you're familiar with databases, these content controls can even be linked to data.

In the Drop-Down List Box Properties dialog box, you can type the entries yourself or configure the drop-down list box to retrieve entries from a database or other data source.

A multiple-selection list box is list of choices that looks like a scrollable list of check boxes instead of a typical list box. Users can select as many check boxes as necessary from the list.