Thanks for contacting us and choosing our product!
All about WC Designer Pro you can see in the section 11 of the document: https://document.harutheme.com/teespace/
About your question have 2 cases: 1. If you created a product image can change color follow this:
About the size of Designer you can set in WC Designer Pro -> Parameter the select parameter you want to edit.
You can set output width or height: https://prnt.sc/52TOA2gqrodx
However you can’t measure the images added by customer directly on the designer.
You can original images by follow this:
About image sizes.
Is there any possibility to install a grid where the customer could insert his print? Because a 9cm print costs us 10 euros, and a larger 9cm print would cost more, and it would be difficult to measure how high and wide the print should be.
I hope you understood the point of my question.
Thanks for your feedback!
In this case we have this solution. 1. Create product attribute with option 9cm or larger 9cm 2. When create Product -> WCDP Actions: https://prnt.sc/MKcyZsXfdUOm
You can set Bleed Area settings to fit what you need.
Hope this helps!