Solution : https://service.sap.com/sap/support/notes/365940 (SAP Service marketplace login required)
Key words :
ctrl+f1 activates trace recording, essential screen processing steps required, display dynamic field modifications, displaying legends transaction st20, previously recorded trace file, left-hand side, sap gui function, similar character errors, select additional events, select additional actions
Related Notes :
| 829096 | Invalid GUI input data |
| 496077 | Screen compression: SUBSCREEN_LOST_FIELDS |
| 324687 | Displaying subscreen borders |
| 66047 | Screen processor: Trace for error analysis |