Formatting a sub-form - help needed!

Formatting a sub-form - help needed!

Hi
I have a form into which I need to insert another form (ie as a subform). This second form has six fields, however when it is inserted as a subform I only want to display two of them.

It seems that this can be done using CSS (see https://help.zoho.com/portal/en/community/topic/subform-formatting). Can anybody give me some suggested code for this, and advice on where to place it? Just use any form and field names you like; I should be able to tweak it to suit.

If it works I'll make sure to report back, because I'm sure others have had this problem as well.