•The red mode button controls the type of object that the right mouse adds to the diagram. See sections 5.1 Delays, 5.2 Setups and Holds, 6.1 Text, 6.4 Marker, and 6.5 Samples.

•The red state button controls the graphical state of the next waveform segment to be drawn. See Section 1.2 Drawing Waveforms.

•Red Delays are delays that cannot draw themselves properly. Look for an error condition in the parameter window to correct the error. See Section 5.1 Delays

•Red Setups and Holds are constraints whose margins are violated. Look for delays and signal transitions that have been moved too close to the control signal of the constraint for the cause of the violation. See Section 5.2 Setups and Holds.

•Red Transitions (rectangles or vertical bars) in the Diagram window are caused by edge transitions that do not change state (i.e. high to high). To fix the error, either delete the transition or change one of the two segment states to a different state. To delete all the red transitions choose the Edit > Clear Red Events.

•Red Clocks are clocks whose formulas or values are invalid so that they can no longer draw themselves properly. Double-click on a clock segment to open the Edit Clock Properties dialog box. See Section 2.1 Adding Clocks.

•Red Waveforms are comparison waveforms whose values differ from the companion signal. See Chapter 9 Waveform Comparisons.

•Blue delta button displays the time between the cursor and the blue delta triangle on the timeline. See Section 1.5 Measuring Time and State Values.

•Blue Signal Names with a black waveform indicates a comparison signal whose comparison did not find any differences to report. See Section 9.1 Performing a Signal Compare.

•Blue Waveforms are signals that are defined to be inputs to a test bench (signals that the simulated circuit generates and a test bench generally verifies for correct performance).

•Blue Delays set only the min edge of the delayed transition. Either the delay is a min-only delay or another delay is dominant at the delayed transition (see Section 5.1 Delays).

•Gray Waveforms are signals that could not be simulated because there was an error in the simulation or because the signals were removed from the simulation using the "Simulate Independently" feature. These signals may also be Compare or Watch signals whose companion signal could not be found.

•Gray signal transitions are the uncertain areas in which a signal transition may change state. An uncertainty region is generated by delays whose min and max times are not equal (see Section 5.1 Delays), or by double clicking on an edge and adding a minimum uncertainty to the edge (see Section 1.5 Measuring Time and State values).

•Gray Delays do not set either edge of the delayed transition. Either the min/max values are blank and can be set by double-clicking on the delay or another delay is dominant at the delayed transition (see Section 5.1 Delays).

•Green Delays set only the max edge of the delayed transition. Either the delay is a max-only delay or another delay is dominant at the delayed transition (see Section 5.1 Delays).

•Green Selection Bar shows a selected signal transition.

•Green dotted box shows a selected object in the drawing window like a segment, text object, or a parameter. Select an object by Clicking on it.

•Purple Signal names with purple waveforms indicate simulated signals (Chapter 4: Simulated Signals and VHDL/Verilog Export).