How can I expand the textboxes in the matrix field when using the regular textbox input?

when having a numeric text box I can only enter numbers, if I switch to a regular text box the cells gets smaller and I am unable to see all of the letter I type in

I am also having a issue with the currency option. I suspected that by using the currency option it would insert the dollar sign ($) when I enter numbers but I doesn't.

After changing the input type, inject the following custom CSS codes to your form:

.form-matrix-values>.form-textbox {

    width: 100% !important;

}

This should fix your problem. Here's our guide to inject: https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes. 

By the way, the currency type means you can just input a currency value, not any currency sign. Inputting the symbol will give you an error when currency is selected.