Why does my two slice toaster tell me to use a certain slot if I

This one-slot toaster that my neighbor gave to me : rmildlyinteresting single slot toaster Single Door Double Door Multi Door Side by Side Freezer Accessories Brand SPA8000 - AUDIO-MULTIMEDIA single slot 4090 Single Door Double Door Multi Door Side by Side Freezer Accessories Brand SPA8000 - AUDIO-MULTIMEDIA

single slot adjustable shelf brackets Product details · EXTRA-WIDE SLOT: Single large wide toasting slot for a lone slice of toast allows you to cook thick slices of bread, English muffins, bagel