1. Add to Convert List.
After you select a folder in upper-left panel or pdf files in lower-left panel, you can select this menu item to add them ot converting list(upper-right panel).
2. Remove Selected files
when you selected single/multiple pdf files from the converting list, you can select this menu item to remove them from the converting list.
3. Clear Convert List
Remove all entries from the current converting list.
4. Convert Files
Select this menu item to convert current converting list to text files.