You can apply CSS rules to the designer. In this way you can change the color of the buttons, fonts, colors, etc and also remove buttons and options.

For instance, you can change the color and size of the buttons as you can see here:

To do so, you can add CCS rules in the backend of the tool and they will be applied in the storefront. To add the rules, go to Settings > "CSS/HTML" tab and add the rules in the CSS field.

Some examples:

- To change the blue buttons and their border to red, you have to add this CSS rule:

.qsmz_ButtonBlue{
    background-color: #FF0000;
    border: 1px solid #FF0000;
}
                            

- To, for instance, remove the "color" button, you have to add this rule:

#btnColorProducto{
    display: none !important;
}
                            

You can see the main CSS classes and ids here:

Notice that you can also change the text on the buttons, messages, etc.. by using the translation tool.