Nikon SLR, go out to shoot scenery or something, how should I set it?

First of all, you should set the white balance. If you don't mind, you should use automatic white balance. If possible, you'd better measure the white balance manually with a gray card or white paper in the shooting environment. Of course, you can also manually set the K value according to your own shooting intention and style, and then try to lower the ISO to no more than 200. If you are a beginner, you can use file A and set the general aperture of shooting scenery to 8- 1 1. The aperture of landscape portraits can be appropriately increased as needed to achieve the purpose of reasonable blurring, generally around 5.6, without opening too much aperture, and at the same time increase or decrease the exposure as needed. In addition, in some environments with large light ratio, A-level metering may not be ideal, so you can manually set the aperture shutter value with M-level according to the needs of composition.