Right now we only provide column-based layouts. I think it'd be reasonably easy to also allow groups (rows). You would create a new dashboard, create a column layout, and that would be "Group 1" (or Row 1). You could then add another "Group" and set a completely different column layout.
Or we could just let you embed Dashboards into Dashboards.
I think we can accommodate this with 1 + 2 and 1 + 3 layouts?
+---------------------+ | | | | +---------------------+ +---------+ +---------+ | | | | | | | | +---------+ +---------+
+---------------------+ | | | | +---------------------+ +-----+ +-----+ +-----+ | | | | | | | | | | | | +-----+ +-----+ +-----+
Is there any other reasonable layout that's not a giant mess (particularly given that columns may be uneven)?
I guess maaaaaaaaaaybe this is sort-of reasonable:
+-------------+ +-----+ | | | | | | | | +-------------+ | | +-----+ +-----+ | | | | | | | | | | | | | | +-----+ +-----+ +-----+
But I think the number of plausibly realistic layouts here is small and we can get away with hard coding them all without letting you embed dashboards in other dashboards.
I think this is all remotely reasonable layouts, exhaustively:
One Column +---------------------+ | | | | | | | | | | | | +---------------------+
Two Column (50/50) +---------+ +---------+ | | | | | | | | | | | | | | | | | | | | | | | | +---------+ +---------+
Two Column (33/66) +-----+ +-------------+ | | | | | | | | | | | | | | | | | | | | | | | | +-----+ +-------------+
Two Column (66/33) +-------------+ +-----+ | | | | | | | | | | | | | | | | | | | | | | | | +-------------+ +-----+
Three Column +-----+ +-----+ +-----+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+ +-----+
Two Column (50/50) + Header +---------------------+ | | | | +---------------------+ +---------+ +---------+ | | | | | | | | +---------+ +---------+
Two Column (33/66) + Header +---------------------+ | | | | +---------------------+ +-----+ +-------------+ | | | | | | | | +-----+ +-------------+
Two Column (66/33) + Header +---------------------+ | | | | +---------------------+ +-------------+ +-----+ | | | | | | | | +-------------+ +-----+ `
Three Column + Header +---------------------+ | | | | +---------------------+ +-----+ +-----+ +-----+ | | | | | | | | | | | | +-----+ +-----+ +-----+
Three Column + Left Header +-------------+ +-----+ | | | | | | | | +-------------+ | | +-----+ +-----+ | | | | | | | | | | | | | | +-----+ +-----+ +-----+
Three Column + Right Header +-----+ +-------------+ | | | | | | | | | | +-------------+ | | +-----+ +-----+ | | | | | | | | | | | | +-----+ +-----+ +-----+
I'm fine if we just simplify it to Header + Current Layout Options. It'd likely solve 90% of the outstanding needs. I don't feel three column layouts are particularly useful for us (that is, we have a task for a 3 column, but it doesn't seem to have much interest).
This might be nice to have some day, but we don't really have open requests for it and I don't have any particular plans to pursue it. The existing set of options seem reasonably sufficient and clear as-is.