Yes, I found the alignment panel, I'm still stuck as to which function to use if I want to select 12 objects in a 4x3 alignment equally across the page?
Select all 12 objects.
Change the Alignment setting to "Page" or probably "Margin" might better.
Then hit the "Distribute Horizontally" button.
You don't need to insert a number. Untick that option if it's ticked.