**onewaytolive**I would like to be able to use conditional logic for a matrix. The number of rows visible will be determined from a drop down quantity list (from the Paypal fields). Is this possible?

Also, can I change individual column widths eg. Address line column would be wider than postcode column.

Many thanks for an excellent form service.

- JotForm Support
**jonathan**Hi,

Unfortunately, you cannot include the Matrix field rows in the condition logic. At most, you can only include the whole matrix field itself (for example, show/hide the Matrix field)

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As for the column width, you can customize them using

**injected CSS codes**.Example CSS code:

.form-matrix-values {padding-left: 5px !important;padding-right: 5px !important}

/*---1st column width---*/

.form-matrix-values .form-textbox {width: 50px;}

/*---2nd column width---*/

.form-matrix-values +.form-matrix-values .form-textbox {width: 250px;}

/*---3rd column width---*/

.form-matrix-values +.form-matrix-values +.form-matrix-values .form-textbox {width: 50px;}

will make your Matrix look like this

Hope this help. Inform us if you need further assistance.

Thanks.