under the microscope

Adverb

Meaning

under the microscope

(idiomatic) Under close scrutiny or examination.
After his productivity flagged, his boss put him under the microscope to try to isolate and correct the problem.

Source: en.wiktionary.org

Synonyms

probationary under the magnifying glass under the loupe

Close letter words and terms

under the lee under the loupe under the magnifying glass under the most favorable circumstances under the most favorable conditions under the most favourable circumstances