'show peaks' is correct and usable in written English.
You can use it to mean to reveal or highlight the best or highest points of something. For example, "The stock market has really been showing peaks this month."
On most nights, his show peaks when he surprises his fans with the new-old lyrics.
The show peaks for me in a work titled Backdoor Pipeline (2010).
The show peaks with a wall of these reverberating images, as Verburg turns intimate moments into breaking news.
Five-year averages for "duck use" days on some conservation areas in Missouri show peaks that come a week or more later in the year than do the 30-year averages.
The star marks show peaks attributed to the quartz substrate.
However, one team's data plots also show peaks and wiggles at other masses.
All the ice block samples show peaks centered around zero position.
UV vis absorption spectra show peaks characteristic of the surface plasmon resonance of Ag NPs.
The spectrogram for AgNPs show peaks for carbon, oxygen, silicon and silver (Fig. 3d).
The histogram of the electrical current extracted from the current maps show peaks of conductive spots.
The XRD patterns show peaks assigned to crystalline HA only for the coated TiO2 NTs prepared at 30 V.
