If you have a big splodge of items (eg, the chest in the echo of a world after a monolith) & you hit Esc twice, it’ll reorder the items on the ground & bring them back onto the screen if possible.
The portal from T now opens up the final monolith portal (takes you to the echo of a world) rather than the normal portal (takes you to the end of time & automatically fails the monolith).