How to format a table in RStudio Notebook output

Question

I am using an RStudio R Notebook in the visual editor and would like to format the default table output for a tibble.

tibble(letters, number=1:26*1000*rnorm(1))

For me it looks like this:

E.g. I would like to define the number of digits and the big.mark separator or the column width, paging, or number of lines.

Also it would be great, if you can show me a way to set these options globally for the notebook.

Thanks