If I did several modifications to the original file, i.e.
1 delete a line
2 insert some text
3 delete another line
4 delete the text added in step 2
5 insert some other text
6 ...
Now I want to recover the text deleted in step 2, is there a way of showing modifications and pick up something?
You can use :reg to view all actions in vim then paste that deleted lines by pressing "2 ctrl + p
If those are the only steps you've done, the deleted text should still be in a numbered register, which you can paste via e.g. "2p. If there have been too many edits in between, or the yank / delete was less than a full line, you won't find it there, though.
Then, you have to use Vim's undo / redo functionality to go back to that editing state, yank the text, then redo the changes. This can be done with the built-in g- and :earlier commands; plugins like Gundo or undotree aid in that by visualizing the undo tree.
