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Excel's Formula - sisman

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546<br />

Part V: Miscellaneous <strong>Formula</strong> Techniques<br />

Figure 19-26: The Settings tab of the Data Validation dialog box.<br />

4. Choose an option from the drop-down list labeled Allow.<br />

The contents of the Data Validation dialog box will change and will display controls<br />

based on your choice. To specify a formula, select Custom.<br />

5. Specify the conditions by using the displayed controls.<br />

Your selection in Step 4 determines what other controls you can access.<br />

6. (Optional) Click the Input Message tab and specify which message to display when a user<br />

selects the cell.<br />

You can use this optional step to tell the user what type of data is expected. If this step is<br />

omitted, no message will appear when the user selects the cell.<br />

7. (Optional) Click the Error Alert tab and specify which error message to display when a<br />

user makes an invalid entry.<br />

The selection for Style determines what choices users have when they make invalid<br />

entries. To prevent an invalid entry, choose Stop. If this step is omitted, a standard message<br />

will appear if the user makes an invalid entry.<br />

8. Click OK.<br />

After you’ve performed these steps, the cell or range contains the validation criteria that you<br />

specified.<br />

Types of validation criteria you can apply<br />

The Settings tab of the Data Validation dialog box enables you to specify a wide variety of data<br />

validation criteria. The following options are available in the Allow drop-down list. Keep in mind<br />

that the other controls in the Settings tab vary, depending on your choice in the Allow dropdown<br />

list.

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