The toolbar is designed minimally to aid your workflow without cluttering the screen. It is your quick access to many of the common functions. The typeset may be triggered and configured right from here. The outline, the editor and the PDF panes may be shown and hidden from here. You can search the whole project as well as view any outstanding typeset issues. The share button allows you to email or export the LaTeX source or the PDF with ease.
The Windows variant of this article will be updated in due course. To try out Texifier for Windows before it is publicly released, please sign up for a beta.