Viewing pictures of the forest can have significant positive effects on people's mood. Below I mention some of the effects of viewing forest images on the mood:

1. Peace and tranquility: Viewing images of the forest can help people feel calm and peaceful. Forests are known as a natural and relaxing environment and their images can convey this feeling to people.

2. Reducing stress: Some research has shown that viewing forest images can reduce stress levels. Watching pictures of the forest can act as a kind of concentration and watching nature and help people to get away from their daily routine and stress.

3. Increasing creativity: Viewing forest images can enhance creativity in people. Forests are known as a source of inspiration for artists, writers and creatives, and their images can stimulate this creativity in people.

4. Improve concentration: Viewing pictures of the forest can help people improve their concentration. There is nature that acts as a kind of natural concentration, and viewing images of the forest can stimulate this concentration in people.

5. Increasing connection with nature: Viewing pictures of the forest can bring people closer to nature. Forests are known as a part of nature and viewing their images can help people to establish a deeper connection with nature.

In general, viewing forest images can serve as a simple and effective way to increase people's mood and relaxation. These images can be used at work, at home, and even in clinics to help people reduce their daily stress and experience improved mood.