How about moving the “Batch” down to the bottom, since the Replace box is quite wide now. And thus we can drag to make it even wider than side-by-side.

And please consider “Pseudo-Maximize” behavior for such windows.
See “Issue D” in: https://www.emeditor.com/forums/reply/23871/
Double-clicking on title bar is more quick and convenient than dragging the border. And Maximize/Restore is much better than changing the size now and then.

Issue 1:
Drag to make Replace box to its minimal width.
Open Batch.
Drag to enlarge the width.
Drag to minimize the width.
Close Batch.
The width now is not minimal.

Issue 2:
The TXT type exported from Batch is not correct.
Only the “Find” column is included.