Consider while creating a pre-set field for other users which will be helpful when entering the value that you have already set where you do not want users to enter the information on their own.
With the use of Data Validation feature in Excel, you can create your own custom error message when the user enters the information which is not predefined.
Let us take an example:
If we want user to enter number between 1 & 10 then the user will not be able to enter any other number like -1, 0, 11 & so on.
To prevent the user from entering numbers other than between 1 & 10, we will use Data Validation Error Alert.
Select the cell in which you want Data Validation to be applied.
Click on Data tab
Under Data Tools group, select Data Validation
Or use ALT + D + L shortcut keys for Data Validation
In Settings group, click Allow drop down
Select Whole Number, select between in Data drop down
Enter minimum & maximum values
Select Error Alert tab & enter the Title & Error Message as shown in below screenshot:
Now, when you enter value other than between 1 & 10 then, the following dialog box will appear.
In case you want user to be able to enter the value skipping the error message
In Error Alert tab; select Style as Warning rather than Stop
After entering the value like 11; the following Warning dialog box will appear
If you want to continue, you can click on Yes button to accept your input value.
If you do not want to continue with the input value then, you can click on No
In this way, you can show the custom error messages that you want to show.
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