If the prompt is simply person drinking, the image may include a whole café scene with tables, windows, shadows and multiple people.

A better AAC prompt would specify:

• An adult or child
• Lifting a cup

You can add more detail as required, such as:

• Sitting in a wheelchair
• At a table

The Global Symbols app also lets you choose:

• A symbol set style
• A culture

The app should ensure that symbols have a white or plain background, and high contrast lines. Note that there is also an option to generate photographic images, which may not need to follow these rules.

Tip: Good symbol prompting is about preventing extra detail from appearing by being precise in what is requested.