Backpack Settings — Travelers Backpack Wiki

To access the Backpack Settings, click the cog icon located in the top right tab of the backpack screen

In Backpack Settings you can change following things:

Select unsortable slots - Marking a slot as unsortable prevents the items inside from being affected by backpack sorting. Additionally, these items cannot be extracted from the backpack by hoppers, pipes, or other automation blocks.
Select memory slots - Marking a slot as memorized binds a specific item to it. When shift-clicking, the memorized item will prioritize this slot instead of going to the first available one. Items inserted via hoppers will also be routed directly to these designated slots.
Toggle backpack visibility - Choose whether or not the backpack is rendered on your character's back.