M880 Quick Lambda question

When using the Quick Lambda for adjusting fueling, do I need to disable the Lambdas control of fuel trim?
Say I am on , say 4000 rpm-40% throttle and the fueling is off enough that it is being trimmed back to target lambda.
If I go to use “Q” once I get right on the 4000-40% sight, does the trimming based on readings skew the numbers ?
Or does it make the proper change , while accounting for the trimming it may be doing.
Apologies if my terminology is incorrect, I am new to Motec and nothing yet is second nature.
Gerry
Say I am on , say 4000 rpm-40% throttle and the fueling is off enough that it is being trimmed back to target lambda.
If I go to use “Q” once I get right on the 4000-40% sight, does the trimming based on readings skew the numbers ?
Or does it make the proper change , while accounting for the trimming it may be doing.
Apologies if my terminology is incorrect, I am new to Motec and nothing yet is second nature.
Gerry