The Texpad toolbar is designed minimally to aid your workflow without cluttering the screen.

osx-toolbar

The buttons and controls on this toolbar are described below.

TypesetPressing this will button will set in motion the typesetting process. A spinning wheel in this button indicates that a typeset operation is in progress. A second-click on the spinning wheel will abort the typesetting. This button may be indirectly pressed by selecting a typesetter from the Typeset menu or an associated hotkey.
TypesetterThe popup menu with the list of available of available typesetters. This includes the auto-detect, the standard and all .tpbuild-based typesetters available.
osx-typeset-popup-menu
Auto-TypesetThis toggle is a means of switching auto-typeset on and off for the current project. This may be set regardless of the universal settings for auto-typeset for new projects.
OutlineShows/Hides the Outline View to the left of the editor pane.
ViewPressing the view buttons will change the arrangement of the editor between Editor only, Editor and Output, and Output only respectively.
ZoomThese buttons allow you to zoom in and out on the PDF view.
OutputThis group of buttons allows you to switch the output pane between the PDF view and the Error log.