There are two parts to this button. The left will bring down the menu, where you will be able to select what grid-scale you want to work in. The right part will enable/disable the grid, so you can work freely if needed.

You can also use keys to increase or decrease the grid. See 'Keys' for these.

This button also have two parts. The left will bring down the menu, where you can select a zoom-factor. The right part will, when no object are selected, fit the entire level into view. When a object are selected, you can click one time to zoom to selection, and click again to fit the entire level into view.

You can also use keys to zoom in or out. See 'Keys' for these.

Icons from left to right:

New 3D-window  will create a new floating 3D-window, which you can place anywhere on your desktop. It only exist as long as you are in the map editor.

Full 3D-view  will take you to a full-screen 3D-display. You must press Escape to return to the map editor.

OpenGL 3D-view  will create a new floating OpenGL 3D-window, where you will be able to preview your light effects.

If you have selected more than one object in the map-views, you have already seen the red linear handle circle. This 'handle' allows you to resize, rotate, shear and move your selection.

If you want this linear handle circle to appear when you select only one object, you must mark this icon.

It is highly advisable that you try to use the linear handle circle, at least once, so you know what it can do. Keep in mind that holding the mouse-cursor steady for a moment on one of the many small handles in the circle, will bring up a little 'flyover' help.

Will open up your web-browser, and display the QuArK main page.