Answer:
It can change a lot of things like what you are trying to convey or even emotion.
Explanation:
When you take a picture you are telling a story about something. And what part of the contents you take a picture of can change your effect of a photo.
For example a speech
If you focus your picture on the speaker can change the effect if you are focusing on the crowd. You could take a photo of the crowd to rely the emotion of the speaker, etc. the list goes on.
You have to have a set goal of what you want to tell the viewer.
1-use number to describe colors
2-the lightness of a color
3-gradation
4-Henri de Toulouse-Lautrec
5- White and black
6-Sofoisba Anguissola
7-A style of art that uses strong contrast between light and dark
8-Put text or images of one color on top of the other color
9-Hard highlights
10-White, black, and gray
I believe what you're thinking of is the texture!
You could add a half note and a half rest. Since there is already a half note (two beats) you could add another half note (two beats) and a half rest (two beats) to equal six beats.