Sony Vegas Pro 11 FX Modification?

I previously operated on Sony Vegas Pro 8, but recently upgraded to the purportedly improved alternative, Sony Vegas Pro 11. This is an admittedly silly inquiry, but on the former version, I was capable of gradually decreasing or increasing the amount of FX applied to a clip (If I was to apply a blur at the beginning of a clip and click on the end of said clip, manually reducing the blur amount, it would gradually decrease during the playback.)

Regrettably, I'm seemingly unable to execute a similar function on Sony Vegas 11. Is it irremediable? :c