1. There are many commonly used design tools such as Photoshop, CorelDRAW, Adobe Illustrator and so on.

2. Of course, the important thing in icon design is thinking, such as writing an article, highlighting the key points, highlighting the theme and simplifying the pattern as much as possible. People can tell at a glance where the point is.

3. If the painter can't do it, you can Baidu the picture material, refer to other people's designs, and then add your own actual situation to ask for revision.

4. For example, your theme is cash register, which is related to money. You can add some artistic decoration to the symbol of money, and combine the movements of your hands, preferably in the style of stick figure, which is clear and prominent at a glance.