If you wish for your customers to have the ability to add and edit their own views/pages, you may enable the Dynamic Views option. Visit Demo.
Price per Area
If you desire to set your own prices for a particular area, you have the option to utilize the "Price per CM2" feature or establish pricing rules for more advanced pricing methods.
Price per CM2
Examples
1x1cm costs 0.05, enter 0.05.
100x100xm costs 1, enter 0.0001.
Pricing Rule "Canvas Size"
Select "Canvas Size" in the Pricing Rules backend and input your own customized "Rule." In this rule, you can specify the target width and height in metric value, along with a specific price. The unit of length will be taken from the settings in Dynamic Views.