detail tables order and child table vertical or horizontal

You can simply go to the page designer, and click on the cell containing the detail tables,

and set it to vertical (look at the right section of your page designer).
And you can drag the details table up or down over the other to reorder them.

https://xlinesoft.com/phprunner/docs/page_layout_grid_type.htm
Drill down to GRID type and view the available options as below.

dear acpan

I select simple grid but

on detail tables cells not selecting

In order to select the cell, you need to switch to advanced grid first.

thnx so much acpan and walk2fly,

solved