Quick and dirty ways with the Control Board and the Document Bar

The Atlantis Control Board can be resized with the mouse if you

place the mouse pointer over its right-hand edge,
wait till the mouse pointer turns into a double-arrow,
press and hold the mouse left button,
drag the mouse pointer horizontally,
release the mouse button when the desired width is achieved (or press the Esc key to cancel resizing).

The Atlantis Document Bar can be resized in the same way by capturing the edge which is closer to the document window.

But there is more to these "resize" edges of the Control Board and Document Bar. Instead of pressing the left mouse button when you get a double-arrow pointer, you can give a double-click instead. This will automatically hide the Control Board or Document Bar. To bring them back on screen, use the commands of the View menu.