I keep entering a new era without changing my momentos, now I know this is a skill issue but it would probably help a lot to have that option more easily noticed. I didn't even know you could change momentos between eras the first couple times I played because the button is in a spot I didn't see.
#Make the change momentos button between eras more prominent
edgy sinew
vernal axle
Also, the current Mementos could be displayed on the top right, next to the player Badge (and let us change it on the next civ preview screen too):
