Customize Wave Form

Hi,

I've tried to customize wave form following documentation on SuiteAnswer, but unfortunately it seems very difficult to achieve our goal.

I created another transaction form (Customization>Forms>Transaction Form click Customize next to WAVE)

This form is preferred

On Sublist Fields tab, as you can see only a selection of item fields are showed.

Also, I've tried to create a saved search to extract the item fields we want to see on wave records. But the result is the same.

Our Goal is very simply conceptually. We want to extract other columns, other fields linked with the item at the level of the line in a wave record. Our customer need to display for example on hand and available quantity at the level of the item line before realeasing wave; this could be very useful to organize scheduling of the orders only using wave functionality (otherwise it is necessary to move out to an external saved search).