IUWEsoft Merge GIFs Pro simplifies the process of merging GIFs by offering a user-friendly interface that consolidates all functions in one window. To combine multiple GIFs, simply click the Add button to import them, which will then be displayed in a convenient panel. Managing your GIFs is intuitive - delete individual items or clear the entire selection with the Remove or Remove All options. Rearranging the order of GIF files is easy; select an item and use the "Move Up" or "Move Down" buttons to adjust their positions. Customizing output settings such as image stay time, output directory, and preview preferences is straightforward. Additionally, adjust GIF speed and replay time to suit your preferences. For seamless vertical GIF merging, IUWEsoft Merge GIFs Pro is the ideal solution.