I'am working with demo of vs11, I've tryed PE4 and Vegas plat. I don't find in vs11 any command to make a group of many clip and move them together on the time line. Is this function missing?
Is possible to rotate a video of a custom degree? I find only step of 90.

What's the difference between ver 11 plus and 11.5 plus? The demo in only ver. 11

I am not totally certain what you mean by "group" the clips but here are some guesses!
If you want to move more than one clip onto the time line then you can "left click" with the mouse holding the "Ctrl key" down and select more than one clip from a library. Then "drag" to the timeline.
Or, you can "right click" on the timeline ans choose "insert video" and then select more than one clip.

If you mean to actually move more than one clip you can select the first clip then hold down the "shift key" and select the last one in the group and all the one in between will be selected and you can drag them.

I think 90 degree rotation is all it will do.

VS 11 plus was the original release which was then upgraded to VS11.5 Plus. The upgrade is free to VS11Plus owners.

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Are you talking about grouping videos that are inserted to the library? If so, just hold down shift and click on the file you want to insert into the timeline. If you are going to file insert into the timeline, then same thing applies. When you do this, click in the order you want them in the timeline, and that's what you will get.

11.5 is better for HD and AVI files and if you go to the corel.com website, they list the new options there.