Use the Caption tab to select batch captioning i.e. adding text and/or an image (if required).

Use the text and image setups to enter the information and press the on/off toggle button so that it displays on i.e. Image Optimizer on Step 2: Caption (p)

Note you mind it useful to setup your caption out of batch mode so you can see the effect. Your settings will be transferred to batch mode.

Step 3: Optimizing

Step 2: Caption (p)