how to access custom form fields - by: lesliemathis

I need to customize my thank you pages and email confirmations to only print form fields that have been filled out.
I can custom-print the standard form fields here:
com_jdonation/view/common/donation_detail.php (email_donation_detail.php)
with
if($row->comments > " ") {
echo $row->comments;
}

but I cannot print out the custom variables. For example: $row->notification will not print anything.

Can you tell me what syntax to use to print custom form fields?