Keith Blount, developer and designer of Scrivener and Scapple on columns, while describing a free piece of software. I agree with his conclusion.
“MyColumn is a shameless copy of Amar Sagoo’s Tofu (which lets you view text in columns), except that it adds editing capabilities and a live word count (Tofu is read-only). MyColumn started out as an experiment. I liked Tofu so much that I thought having a multi-column view in Scrivener might be a good idea, but then I decided against it. You can read Amar Sagoo’s theory on why he thinks reading text in columns is easier on the eyes over at his site. I think he is right. But what I found out is that whilst it may be better for reading, it is not better for editing – when editing, because the text moves around, columns make the text seem less stable. I offer this freeware download so that you can decide for yourself. If you do like reading text in columns, be sure to download Tofu from Amar’s site, which is a lot more refined (it has smooth scrolling and allows you simply to drop a file into a window to open it, for instance). The source code for MyColumn is also available (see below for details).” Keith Blount https://www.literatureandlatte.com/freestuff.php