Otherwise layout (among other things) won't have stylesheets available when needed, resulting in wrong layouts. This is a timing-related issue, so depending on e.g. code arrangement in notebook cells or delay between evaluating cells, one may get either good or bad behavior.
Otherwise layout (among other things) won't have stylesheets available when needed, resulting in wrong layouts. This is a timing-related issue, so depending on e.g. code arrangement in notebook cells or delay between evaluating cells, one may get either good or bad behavior.