There are several ways to prevent someone from copying cells from your worksheet, depending on the specific software and platform you are using. Some of the most common methods include:
Password protecting the worksheet: Most spreadsheet software, such as Microsoft Excel, allow you to password protect a worksheet, which will prevent others from making changes or copying the data without the password.
Protecting specific cells or ranges: You can also use the built-in protection features of your spreadsheet software to protect specific cells or ranges of cells from being edited or copied. This will allow others to view the data, but not make changes or copy it.
Using a macro: You can create a macro that will disable the copy and paste function for a specific worksheet, so that others cannot copy the data from that worksheet.
Restricting editing: Some spreadsheet software allows the user to restrict editing on specific cells, ranges or the entire sheet. This will prevent others from making any changes on the sheet or copying the data.
Watermarking the worksheet: You can also add a watermark to the worksheet, which will make it clear that the data is protected and should not be copied.
It's worth noting that while these methods can help prevent unauthorized copying of data, they are not foolproof and determined individuals may still be able to copy the data by using other methods.