Activate the case document you wish to operate on and use the mouse
to select the trials whose data you want to delete.
Select Delete Trials from the Options Menu.
A dialog box appears. Press the Help button if you need instructions
on how to fill in the dialog box fields. Fill in the fields that are
not grayed or accept defaults and press Ok to continue. Or press Cancel
to abort.
Wintrack will delete data in the specified trials and redisplay the
case document.
Deleted trials will be replaced by empty place holder trials, so the
layout properties of the case document will not change.