SAP NetWeaver AS ABAP Release 740, ©Copyright 2014 SAP AG. All rights reserved.
ABAP Keyword Documentation → ABAP Glossary →Input help button
Single-digit pushbutton with an icon, which is displayed to the left of an input field on a screen if an input help is defined for that field. Selecting the pushbutton has the same effect as pressing F4 for the field.