Actually I am having the very same problem with the trim function on PD8.
The instruction video here
http://www.youtube.com/watch?v=osj2FVDcm5Y only tells you how to remove footage from the beginning of the clip and not in the middle.
I have tried many times to remove a bit in the middle and it does not work. As you can see from the comments on the above tutorial many others agree with me.
So, how do you trim a piece out of the middle of the clip?
Thanks.
Phil
Tell the truth - but gently.
PD14 Ultra
i5-6600K OC CPU, Asus Z170-P Motherboard, 4G Asus GeForce GTX 960, 240GB SSD, 1 x 1TB Seagate HDD, 1x 1TB SSD external backup HDD, 8GB RAM