The Input section is where you will add the SVG files you want to merge.
File list: All the SVG files currently added. If you select a file in the list, a preview of that SVG file will be shown along with the dimensions.
Add File: Click Add File to bring up a file choose window to choose SVG files to add.
Add Folder Click Add Folder to choose a folder, where all SVG files in the selected folder will be added. If
Include subfolders is checked, SVG files in any subfolders in the chosen folder will also be added.
Remove: Remove the selected SVG files from the list.
Remove All: Removes all SVG files from the list.