Letterbox is a plugin for Apple Mail that optimizes widescreen monitors by arranging the interface into three vertical columns. This places the message pane next to the message list rather than below it.
With Letterbox, the traditional Mail.app interface is rearranged into three vertical columns. This means that the message pane is shifted to the right of the message list instead of being located below it. This arrangement frees up space for more efficient and comfortable reading of email threads.
You can customize Letterbox to your preferences as well. You can choose from three different inbox layouts, and there are options to change the font size and background color, too.
Another great feature of Letterbox is its compatibility with other plugins. You can use this app in conjunction with other Mail.app plugins, such as MailTags, without any conflicts.
Overall, Letterbox is an incredibly useful plugin for those who want to maximize their workspace and enhance their Mail.app experience. It's simple, reliable, and highly effective. The best part? It's free to download and use.
Version 0.24 Beta 5 / 0.22: N/A