Final answer:
To increase a slide's effectiveness, using less text is the best choice as it keeps the audience engaged and complements the speaker's words, while a relevant image can enhance understanding.
Step-by-step explanation:
To make a slide more effective, typically using less text is advisable. A slide should serve as a visual aid that complements the presenter's spoken words, rather than a document to be read verbatim. A slide with too much text can overwhelm the audience, leading to disengagement. Therefore, it is more effective to distill the content down to key points and to use bullet points or short phrases rather than full sentences. Adding visual elements like relevant images or graphics can also help to illustrate the points and make the slide more engaging. However, the image should support the message of the slide, not distract from it. Lastly, maintaining the title helps to orient the audience regarding the slide’s subject matter.