Hello, Kanchan Dafane,
Thank you for your inquiry.
1. To change the size of the Quantity Input and the border color, please copy and paste the following CSS code to XStore >> Theme Settings >> Theme Custom CSS >> Global CSS and adjust the values as needed:
.single-product .quantity-wrapper.type-square span {
font-size: 15px !important;
border: 1px solid #1e73be !important;
}
2. Unfortunately, it is not possible to edit the product’s short description with any page builder. This is a default functionality and can only be edited with the WordPress editor.
We hope this information is helpful.
Best Regards,
8Theme’s Team