Changing Activity type for 3000+ Activities

Perform a global. 

Where - Activity Type Equals Resource dependent

Then Activity Type Equals Task dependent

Click Change

the other easy way to change the multiple activity type is..

add another column into your p6 layout>add "activity type" column this code can be found under general category>change the first activity from "resource dependant" to "task dependant">select all the activity you want to change>right click and click fill down.

for code type changing i usually use the fill down function because it much more easier and faster. hope this help