Double graphic opacity

[Draven_Caine]

I have the background of one of my windows usingt he in-game opacity slider, ok simple enough.
When this background opacity slider is changed I need it to also change another graphics opacity automaticlly.

These 2 graphics are part of the same window and need to be 2 seprate graphics because one is pet restricted and the other is target restricted.

Is this possible? If so, could someone point me in the correct way to do this?

Thanks in advance,
Draven