How do I assign stimuli to bus bits?

You can either assign the same stimulus to all the bus bits or different stimuli on different bus bits.
To assign the same stimulus to bus bits:

Select a stimulus.
Select a bus in the Pin Assignment section.
Click in the toolbar of the Pin Assignments section.

To assign different stimuli on the bus bits, perform the following steps for each stimulus:

Select a stimulus.
Select the required bus bit.
Click in the toolbar of the Pin Assignments section.
Repeat these steps for each bus bit.

You can choose to leave a bus bit unassigned only if it is disabled. To disable an unassigned bus bit, right-click the bus bit and select Disable Selected Bus Bits.