
You can use F1 help from the SAP GUI for UI element help texts. To do this, the relevant data element documentation must already exist in the system, and the content element concerned must be connected to an ABAP dictionary field with F1 help.
You can then call this help in your application by choosing the option More Field Help from the context menu of the UI element. The documentation from the system is then displayed.
Example of data element documentation for Delivery Time in WDR_TEST_HELP: