Where is the "custom scan" button?

Using version 7.0.1474 of the free Avast, I see many references to custom scan but for the life of me I can’t find the button that is mentioned.

Where the heck is it? I only need to scan the C:\ drive not the other 2 partitions.

I’m sure once I post this I’ll find it, I know how it goes! lol

Thanks

J T

On Avast 8 it is here