Controls Clicking on the Controls button opens a floating window which contains rotation, alignment, zoom, pan, and home controls for the 3D Real-time model. This section consists of several buttons: The Rotate buttons allow you to rotate the model in any direction one degree at a time. Hold the cursor on a button to rotate the model continuously. The Align icons allow you to spin the model clockwise by clicking on Align right or anticlockwise by clicking on Align left. The Zoom controls enlarge or reduce the model image. They can be used several times until the maximum or minimum zoom is reached. Clicking on one of the Pan arrows moves the model up, down, left, right or diagonally in a linear fashion. Hold the cursor on an arrow to move the model continuously. Clicking on the Home icon brings all objects visible into the centre of the view. Clicking on the Frame All icon fits the current model into the image window so all of it can be seen. This is particularly useful if you have zoomed in on a structure and now need to see it in relation to the rest of the view. Clicking on the Home On Object icon centers the view around the object selected. If no object is selected,the view will center on all objects visible.