How to set logic levels in LTSPice to 5 volts?

LTSPICE IV - How to...

How to change logic levels in LTSPice?

Right-mouse-click on the device in your schematic.

A dialog will be shown.

Enter the parameter(s) into any of the fields
from "Value" to "SpiceLine2".

Vhigh=5 Vlow=0 Ref=1.5
Trise=5n Tfall=5n Td=5n

"Ref" is the threshold. Default is (Vhigh+Vlow)/2

Don't connect anything to unused inputs!