[web2py] variable column widths - per column, in custom forms

Hello all I've dome a lot of searching and trying to no avail. I have used the welcome template - hence layout settings follow. Custom forms works fine. Currently 3 rows, with 3 columns. Each column: 1st is label, second in a variable (IS_IN_SET works fine) related to than label, 3rd is another va

[web2py] IS_IN_SET and IS_IN_DB, but my focus is on SQLFORM.widgets.multiple.widget - with multiple=True

Morning. Does anyone have an EXAMPLE/S of the use of the above, with multiple=True. I am relatively new at this - although am getting there - but am stuck on this one. As indicated I'm looking for examples please - a few if possible. I am using db.auth with extended variables, with list:ref