The compare options were there as a button using the split screen in the version before I introduced the docking stuff. It shows the differences between 2 documents.
Open the 2 documents, and usually I put them side-by-side. Then in first document use the context menu to set first file to compare, then in the other document use the context menu to set the second file to compare. You should then see the differences in the files highlighted in red in the first and green in second.
I sometimes open the unedited version of the same program to check changes I have made before saving.
EDIT
Just fixed a bug where SB-Prime could crash if a document window is closed while it is doing a difference.
Open the 2 documents, and usually I put them side-by-side. Then in first document use the context menu to set first file to compare, then in the other document use the context menu to set the second file to compare. You should then see the differences in the files highlighted in red in the first and green in second.
I sometimes open the unedited version of the same program to check changes I have made before saving.
EDIT
Just fixed a bug where SB-Prime could crash if a document window is closed while it is doing a difference.
![[-]](https://litdev.uk/mybb/images/collapse.png)