Lower case letters are normally used for all other purposes.

Select key words and print using upper or lower case letters.

The publisher writes the name in lower case letters only.

At least "the west" is in lower case letters.

Lower case letters are rare in most drawings of machines.

I can read you just fine in lower case letters.

It depends on the design of the lower case letters.

Lower case letters are included in the form of small caps.

I use upper and lower case letters, do you see?

There are no lower or upper case letters, but the first letter of a proper name was often written a bit larger.