You can follow the steps below:
(1) Open Wavelet App, (2) Select Continuous Wavelet 1-D option, (3) Click File > Example Analysis and select any example, (4) Then, in the Local Maxima Lines plot, right click on a line and the buttons will be active. (you can do the same for their analysis; right click on the Local Maxima Lines.)
Theses steps are explained in detail in the link below: