Joining projects

If I create a video several videotracks they are merged together and it is difficult to change it later.

When I save a project, all informations are kept and when I reload it I can continue to change it.

How can join two such projects?

Project 1 is on the timeline. It has one sequence.

Click the Menu item (top-left of the window), then FILE, then IMPORT CLIPS FROM ANOTHER PROJECT.

This will add that project as Sequence 2.

If you want to combine them into a single sequence...

Click the Sequence 1 tab above the timeline, and from the bin add Sequence 2 to Sequence 1.

Or click the Sequence 2 tab and from the bin add Sequence 1 to Sequence 2.

Do this by dragging or via a right-click on the bin sequence, which will drop down a menu that offers several timeline placement options.

Think logically.......

Create your first project. It can have any number of tracks/effects/transitions etc.
One you are happy with it, create a Sequence by clicking the + that follows Sequence 1 x at the left end above the timeline. . This creates a single clip of your work and puts it into the Sequence clip bin. It also clears the timeline.
Now do Save Project As . You now have a .vpj file of your work
Open VP and start work on your second project.
When ready, click Menu/File/Import Clips from Another Project as Borate has described
Select your vpj file from Project 1
As well as loading all the files from the first project, it will also load the Sequence you saved.
Open the Sequence bin and and load your first project (as a single clip) to a suitable point on the current one..like any other clip. Although you won't see an audio track, the sound will be there.

Nat

thanks to Nationalsolo and borate.