Context
In the ABAP source code editor, the best matching ABAP keyword is displayed when
start typing the keyword. If you choose the tabulator tab, the keyword is
inserted.

Figure 1:
Display of a proposal for a certain keyword while typing
Procedure
Open the preferences page:
to deactivate the Suggest keywords option.
Results
The selected keyword or identifier is added to the source code at the position you have
triggered the code completion.