On the Source Files panel, you choose which files to optimize.
For options on how to save the optimized files, see Batch Optimization: Optimized Files Panel.
Select Click to open a file selector that lets you choose the file or files to optimize.
Browse Click to display a directory browser that lets you choose the directory to process.
When on, ProOptimizer scans subdirectories and batch processes the eligible files in them. When off, it processes only files in the specified directory (the root). Default=on.
This option is disabled when File Selection is active.