how do I add a field group to a custom subtab on a form?

AI generated answer (using internal Slack threads):

To add a field group to a custom subtab on a form, follow these steps: 1. Navigate to the custom form itself. You can do this by viewing an example transaction, and then selecting Customize > Customize Form in the upper right. This ensures you're selecting the correct form. 2. On the custom form, select the Field Groups tab. You should see a list of subtabs where you can add the field groups for each subtab. If you have a lot of subtabs, you may need to scroll right to see them all. 3. If you've created a new subtab and it's not showing up, make sure you've added at least one field to that subtab. The subtab may not show up until you have at least one field on it. 4. If you're still not seeing the subtab, try removing it from the record and then re-adding it, save, and apply to forms. This can sometimes force an update. 5. If all else fails, you can use the move elements between subtabs feature to move your field group to the desired subtab. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******