how to set DC stimulation controller sweep unit accordingly

Hi

i have encounter an problem, how to set the unit for parameter sweep in the dc sweep controller.

in this case i wanted to set it to "uA" as shown in my IBB current source.

thanks

In the circuit you showed the current source is set to generate a current from 10 uA to 100 uA in 10 uA steps. The setting is given directly in the I source where you have written "IBB uA", so any number you set IBB is in uA.
If you prefere, you could also delete uA from the I source (leaving only Idc=IBB) and write in the DC controller:

Start=10u
Stop=100u
Step=10u

the result is exactly the same.