Definition of "in evidence"

the guardians of the law were well in evidence, the obvious reason being they were paid to protect the upper classes.

1922 February, James Joyce, Ulysses, Paris: Shakespeare and Company, […]

The Renaissance saw a renewed interest in flowers and decoration became more studied and elaborate, garlands and wreaths being much in evidence in paintings of this time.

1978, Jacqueline Seymour, “Introduction”, in Garden Flower, Crescent Books, page 3