The Columns tab in the Substructure Template UI is not user friendly for more than 1 column. The program seems to be doing too much to try to assist user entry, but it ends up causing the window to become glitchy and less functional.

Ideally, a user should be able to edit parameters for 3 to 10 columns without needing to scroll. Each column type has only 6 variables at most. I suggest creating a table that uses the variables as column headings and each column as a row. This will greatly improve user operability. It would be even better if that table could allow pasting from Excel or other spreadsheet.