Button

Buttons are a very important part of communication between software and users, because users actively click on them with a purpose. Therefore, it is essential to differentiate them from other elements. It is essential to distinguish it from other elements.

For example, as mentioned in "What is UI? When flat design started to be popular, it was a square, solidly painted button as shown in the left figure. When flat design first became popular, it was a square, solidly painted button like the one on the left. Nowadays, these buttons are rounded or shaded to make it easier to recognize them as clickable. In addition, the use of icons makes it easier to visualize the action to be performed when the button is pressed.