How to reverse it?

[ccting]

Description :
Umbrellas provide a wide angle of light spread and total light coverage, particularly when used in bounce light situations. This reversible umbrella offers 2 different qualities of bounced light with its reversible sides: a high contrast silver bounce and a soft white bounce. The silver side provides a high output bounce that increases contrast, while the soft white side provides a softer source that brightens the total scene

How do I switch to silver bounce?

Ty.

[zona5101]

With the black/silver cover on it is the silver bounce. The silver bounces through the white translucent. Take the black/silver cover off and it's a shoot-through. Put it on and it's a silver bounce. It's not as efficient as a regular silver bounce and the specular highlights are slightly reduced but it is a nice compromise to have a dual purpose umbrella.