Rick, Thanks for your reply.
I am not ready to build a complete app, just yet, I am just trying to familiarise myself with Anvil to see what can be done, so please excuse my ignorance.
So in the meantime, I thought I would try to display a grid of 81 cells laid out like a Sudoku.
In the designer, I first tried to lay Textboxes, side by side, but they always ended up below each other in a column. So I thought I would try to first add a Datagrid and then add Textboxes to that, thinking it would act like a container, but could not insert anything into the grid, using the designer.
Finally, I ended up using Python code to add Textboxes at run-time, and using a role to try to position them - very crude, I know.
I am probably going about this in completely the wrong way, but I am trying to learn.
Regards, Chris.