Spacing Controls on Pages
Provide adequate space between controls on a page so that fields and their labels don't touch or overlap other controls or labels in PeopleSoft Application Designer. If they do, then when your page appears in the browser, the label is offset automatically and the overlapped control might shrink.
Overlapping Fields
You can layer or overlap fields only if the one that you are overlapping is set to Invisible on the Use tab of the properties dialog box for that control. When you move through the data entry controls on a page, the component processor recognizes only visible, non-hidden fields as available for entry.
You can layer multiple invisible fields. However, you must set up your stacks of edit boxes so that all but one field in the stack are invisible or hidden at RowInit time.