I am trying to append some animations from other Origin files that I worked on. These files are animated files saved as .opj. I then open up a new Origin file and delete Book1. I then go to File-->Append and open the files I want to append. However, they don't appear on the screen or as windows. Am I missing a step?
On left panel of Origin workspace, there should be a Project Explorer. It can be auto hidden so you can click to show it. If it's closed, you can use View: Project Explorer to turn it on.
You should see subfolders under your current Folder1 for each opj you appended.