As the designer's use of language and description Thailand. The preparation of these buttons on every page of the application. So that the user does not confuse the function of these buttons
The designer uses images and descriptions, as well as Thai language placement of these buttons on every page of the application, so that users do not confuse the workings of these buttons are
The design used a picture and description in English and put these buttons on every page of the program to the user is not confused in the operation of these keys