If you offer products that have multiple views that can be personalised, you may need to charge extra for each view of the product that is personalised.
This can be done in Magento by going to Catalog>Manage Products and then clicking on a product to view the details of that product.
Once inside the product, you should select the Custom Options tab from the left and then click the Add Custom Option button on the right.
You need to select drop-down as the type of custom option and set the title as Number of Views Used.
You should then add some rows to the drop down with the SKU set to match the ones' below, along with the relevant price data.
Your final custom options should look similar to the one shown below.