The text editor jedit allows the view of a file to be split into 2 windows. This is useful when a document is large and viewing 1 part of a document whilst editing another part simultaneously.
The same function is already available. You can open the same document in 2 windows: menu Windows > New Window. Closing as WorkForMe. Best regards. JBF
OP certainly meant splitting into _panes_, not windows - which is what jedit supports. This is very useful when making changes to documents, when you want to compare what you've done in different places in a document. Using two windows for the same effect is kludgy and inconvenient to arrange, plus - it takes up a lot of screen real-estate for duplicated UI, which makes it rather impractical on smaller monitors. So, reopening.
*** This bug has been marked as a duplicate of bug 31481 ***
*** This bug has been marked as a duplicate of bug 42428 ***