With the upcoming release of the BlackBerry Bold some may notice a few new theme options in OS 4.6. With the new version for the Bold you are able to adjust the size of your homescreen grid. By default the grid shows 6 columns and 3 rows. This new feature allows you to change it to 4×4, 3×3, 2×2, or 1×1. This will be handy for some people who have difficult seeing the fonts and images.
[Source - BerryReview]