Patent Number: 
Section: claims

1. An exposure method of exposing a substrate to a pattern, in which a mark in each of a plurality of layers on the substrate is detected for alignment of the substrate, said method comprising steps of:illuminating a mark in each of a plurality of layers on a substrate;detecting an image of the illuminated mark in each of the plurality of layers; andsetting an illumination condition in said illuminating step for the mark in each of the plurality of layers, wherein, in said setting step, the illumination condition is set based on a manual indication. 2. A method according to claim 1, wherein the manual indication is performed through a manual switching part. 3. An exposure method of exposing a substrate to a pattern, in which a mark in each of a plurality of layers on the substrate is detected for alignment of the substrate, said method comprising steps of:illuminating a mark in each of a plurality of layers on a substrate;detecting an image of the illuminated mark in each of the plurality of layers; andsetting an illumination condition in said illuminating step for the mark in each of the plurality of layers,wherein the illumination condition is set based on the detected image. 4. A method according to claim 3, wherein the image of the illuminated mark in each of the plurality of layers is detected in each of a plurality of illumination conditions, and the illumination condition is set for the mark in each of the plurality of layers based on the detected images. 5. A method according to claim 4, wherein the illumination condition is set for the mark in each of the plurality of layers based on a contrast of each of the detected images. 6. A method according to claim 4, wherein the setting is performed for each of a plurality of substrates. 7. An exposure apparatus for exposing a substrate to a pattern, said apparatus detecting a mark in each of a plurality of layers on the substrate for alignment between the substrate and the pattern, said apparatus comprising:a detection system which illuminates a mark on the substrate and detects an image of the illuminated mark; anda setting system which sets an illumination condition of said detection system for a plurality of marks, used for alignment, on the substrate, with respect to each of the plurality of layers, wherein said setting system sets the illumination condition based on a manual indication. 8. An apparatus according to claim 7, wherein said setting system includes a manual switching part.