I use PD 17 so may be different.

On the first tab menu there is an option to import a project.

i import the project. on the time line, appears the project as a complete blue section if highlighted shown with a tab on the time line.

if you click the tab, the imported clips with the edits are displayed.

you can either concatenate the pds p files and save the whole as a pds file.

What I do is to start each seperate PDs file with a colour marker, and copy the clips to the time line of my first Pds file / tab.

the marker shows the clips on the line and where subsequently each copied PDs contents are displayed.

This allows me to make changes if titles are needed or transitions added. Obviously (maybe not;. The colour markers are deleted.

SAVE the main Pds file as you go.


Happy editing

edit hopefully have corrected all the unpredictable predictive text. !!!