How do I optimize epubs already on device?

[flippedcracker]

Device

X4

Affected Version

4.7.1

Build Variant

tiny

EPUB Optimization

No / Not Applicable

Cache State

All of the above

Describe the Bug

I see this on the README:

Already on the SD card? Select EPUBs in the file manager and use the Optimize Selected action to bake them in place without re-uploading.

But I don't see that specific option "Optimize Selected".

Steps to Reproduce

Just need help

Expected Behavior

An option for optimizing?

Relevant Log Output/Screenshots