Interphase-3 instead of four

Hello guys,

I am new in using R.

I just installed r studio and I am getting

instead of the expected four interphase

specifically the untitlled is missing.

how do I rectify this.

please assist

if you want a source pane you have to go to the file menu and choose file > New File > RScript , or use Crtl+shift+N keyboard shortcut