Instructions
Move the mouse to the brick palette on the right side of the screen. Click the "Categories" palette located right above the "Brick" palette. Click on one of the brick categories. Move the mouse to the type of brick you are looking for and click the left mouse button.
Press the arrow keys on the keyboard to rotate the bricks. Do not use the arrows on the number pad. The right arrow rotates the bricks to the right, the left arrow rotates the bricks to the left, and the up and down arrows rotate the bricks up and down, respectively. Click the arrows on the "Camera Gadget" to change the view around your model. The "Plus" and "Minus" buttons on the on-screen display zoom the view in and out, respectively.
Click the color you want your brick to be from the "Color" palette under the "Brick" palette on the right of the screen. You can color bricks that have already been placed by clicking the brick, selecting the paint tool and choosing a color. The colors with the "T" in them are transparent.