Dropdown list box in qlik sense mashup

[qv_testing]

HI Community,

Just entered into Qlik Sense Mashup development

Can you please help, how to create drop-down list-box??

like below.....

[qv_testing]

Have seen below site, exactly what i need,  have tried but I'm not able to get...

https://webapps.qlik.com/mapleleafs/index.html?_ga=2.229059484.1648077216.1571077970-222201255.15479...

Can you please help!!