Effects of strongly lensed image properties on microlensing. Normalized strains obtained by LENSINGGW in the Hanford detector for a compact binary lensed by an elliptical galaxy and ∼600 microlenses (as documented in Sec. 3.1). Microlensing is enhanced by strong lensing on the positive parity side (top panel) and the negative parity side (bottom panel) of the galaxy. As the magnification of the macroimage |μ| is increased (dark yellow curves, from bottom to top in each panel), the microimages lead to more prominent oscillations at the positive-parity side. In contrast, the negative-parity side exhibits the opposite behavior. Inspection of the image properties through LENSINGGW attributes this to the difference in relative magnifications and time delays among the microimages produced by the different scenarios. In both cases, microlensing boosts the S/N of the unlensed signal (light yellow curve) and turns it from a subthreshold event to a detectable one, as demonstrated by the superposed noise curves of LIGO and Virgo (gray lines).