Opens an existing project.

 Toggles overlay of a grid on each deck displaying a red dot at every frame interval.

 When one deck falls behind another, Obscurer will hide all but the closest decks.

Translates the viewpoint by digitizing a new view center.  After pressing this tool bar button or selecting this option from the menu,  the user can hold down the Viewport Button and drag the drawing to get the appropriate portion of the architecture on the screen.  This will be the default action for the Viewport Button until another Viewport action is selected.

Three-dimensional rotation

 Three-dimensional twist

Magnifies or reduces the size of the user's view of the drawing in the Viewport. After pressing this tool bar button or selecting this option from the menu, the user can click the Viewport Button over the Viewport to move the relative view closer to the structure. This will be the default action for the Viewport Button until another Viewport action is selected.

 Zooms to the compartment that you will select off a list.

 Zooms to the device that you will select off a list.

Change the user's view of the drawing in the Viewport to its original size and position.  After pressing this tool bar button or selecting this option from the menu, the user can click the Viewport Button over the Viewport to reset the size and position.

Refresh the display of the CAD drawing. After pressing this tool bar button or selecting this option from the menu, the screen Viewport will refresh itself and eliminate any garbage in the Viewport.

Displays program information, version number, and copyright.

Upon selecting this, the mouse cursor will change to a help mode. While in this help state, the user my click on anything on the screen and a help screen will be presented describing the function.