I need to create a complex matrix check box, like the one in the image but I couldn't find a way to merge cell in the matrix and/or leave empty cell

Dear Jotform team,

I need to create a complex matrix check box, like the one in the image but I couldn't find a way to merge cell in the matrix and/or leave empty cells..  How can I do a table like this?

Thanks!

Hello,

Thank you for contacting us.

Just to clarify you wanted to merge the fields into one like the one in my sample image?

I think you can hide and unhide this using CSS. Kindly clarify what you are trying to accomplish. We'll wait for your response.

Hi, thansk for you fast answer.

No, I want to marge de cell to get the result displayed.

The cells on red are already merged in this image but I can't do the same in jotForm...

This way I can have two sub-categories under the same "double column" - for example the two collumns from the righ are under the same categorie..

The two horizontal lines on red are also merged cells without checkboxes..

I'm using matrix tool to do this in jotForm.