I am using a 4 level Outline in my spreadsheet... I'd like the cascade of
the outline to go from left to right.

IE: my sheet has twenty columns and are grouped in four columns each. I
would like the outline to group as follows:
columns 5-8 displayed, then
columns 9-12, then
columns 13-16, then
columns 17-20 last

The reason is that this is an explanding sheet so as needed you add groups
of columns in fours to the right side of the document.
Excel insists on doing just the opposite... I need help please.