@Luis_Van_Gogh
Hi Luis,
If you have only changed the OTS (One Touch Settings) of a style (not the settings of the style parts), you can simply save the style again via the Style Selection display (to the User drive or the connected USB stick). In this case you do NOT have to call up the Style Creator. (See the SX900 Owner's Manual, page 54, "Memorizing Original Panel Settings to One Touch Setting".)
If you have changed the settings of the style parts and want to save them directly in the style, you have to use the Style Creator to do so.
The easiest way, however, is to save all changes in Registrations. It is important that after pressing the Memory button you check whether the correct checkmarks are set:
In order to save ("memorize") the current Right Voice settings in Registrations, the checkmarks "Voice" and "Keyboard Harmony/Arpeggio" must be ticked.
The current Left Voice settings as well as changes to the voices of the style parts are saved with the "Style" checkmark. In addition, the checkmarks "Tempo" and "Transpose" should be ticked. For me, also the checkmarks for "Multi Pad" and "Scale Tune" are usually ticked. (See the SX900 Owner's Manual, pages 87/88, "Saving and Recalling Custom Panel Setups with Registration Memory".)
Best regards,
Chris