How to set max characters per line and max lines per page

Max char per line sets the maximum characters allowed per line. Each line will have at most this number of characters (excluding timestamps and line numbers).

Max lines per page sets the maximum number of text lines allowed per page. Each page will have at most this number of lines. Depending on line spacing settings for styles, pages may have less than this number of lines.

Both controls are found in the Page Layout page in the Toolbox dock. Both max char per line and max lines per page can have an automatic value if the number is set to zero. In this case, it is up to the editor to automatically fit text content based on page layout and the style properties.