FreeWorship is best in managing your slides making use of the preview pane in the top right.The Preview pane gives you the feel of your presentation while preparing it.You can make sure your presentation is in line with your passages by viewing it on the preview pane from the start.I also like that the bible verses are automatically displayed as you type the numbers.In genera i like that it is user friendly and that it lets you check on your progress while preparing your presentations.