Editable textboxes

hi there,

i just want to know how can I make the textboxees editable or how the customers can edit the text, like font, color and size.

I only found the text box as a solution. Because the insert text button at the front doesnt work. the textsize wont be bigger if a change to size from 18 to 40.

I want to create a shirt with a free text editor, so that the customer can choose the font, size and color.

does anybody know how can I fix the problem. I work with the woocommerce plugin.

best regards