Last Days Of Hadley's Hope token question

I would like to change the tokens of the Aliens from the generic Letters to graphics. But the NPC Monster sheets are locked and read only. How do I change them please?

Thank you.

I'm not familiar with this particular system or its FG implementation but can you create a copy by re-dragging the NPC into the NPC window?

Adventure modules are not locked for editing - you can edit the NPCs from the module using the lock button. But the module has just 2 NPCs, the rest is from the core module, which is locked. You have to clone the entity to modify.

Thank you. I have a workaround. And have just copied them to the uncategorised category, then use that section to populate the CT when needed. Thanks anyway.