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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.
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https://support.microsoft.com/en-us/office/add-a-l…
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. You can add a Form Control or an ActiveX Control combo box.
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https://support.microsoft.com/en-us/office/add-or-…
Add or remove items from a drop-down list - Microsoft Support
After you create a drop-down list, you might want to add more items or delete items. In this article, we'll show you how to do that depending on how the list was created.
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https://support.microsoft.com/en-us/office/insert-…
Insert a multiple-selection list box - Microsoft Support
To automatically create a repeating field in the data source that is bound to the multiple-selection list box, select the Automatically create data source check box.
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https://support.microsoft.com/en-us/office/sort-da…
Sort data using a custom list - Microsoft Support
Sort a list by days of the week or months of the year or sort by priorities in Excel. Or you can create your own custom list for items that don't sort well alphabetically.
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https://support.microsoft.com/en-us/office/apply-d…
Apply data validation to cells - Microsoft Support
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 more in this video.
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https://support.microsoft.com/en-us/office/remove-…
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.
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建立下拉式清單 - Microsoft 支援服務
若要在 Excel 中更輕鬆地輸入資料,或是將輸入項目限制在您所定義的特定項目數內,您可以插入有效輸入項目的下拉式清單 (也稱為下拉功能表或下拉式方塊)。
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https://support.microsoft.com/en-us/office/create-…
Create a cascading list box - Microsoft Support
Cascading list boxes help users fill out forms faster and help ensure that users enter data correctly. This article describes how to create and populate cascading list boxes with data.
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https://support.microsoft.com/en-us/office/create-…
Create or delete a custom list for sorting and filling data
Use a custom list to sort or fill in a user-defined order. Excel provides day-of-the-week and month-of-the year built-in lists, but you can also create your own custom list.