I'm having eight columns in my Qweb. In that, first two columns are fixed, next three columns are optional,last three columns are fixed.

I'm spanning first five (two fixed and three optional) and last three columns (fully fixed).

I want to span last three columns by default.

But the problem is, If optional columns are not present, it spans first five columns. I want to span last three columns by default whether not to span in first five columns.

Hope my question is understandable! Kindly help me here!