If the chat is hard to read, you can make the font size larger. Go to the upper right corner of the Chat area and click on the menu icon (pod options), which looks like four horizontal lines stacked on top of each other. There, you will see options to change your chat color and text size. Some instructors don't want students to change their chat color, so please check before doing so. However, you can change your text size whenever you like, because that only impacts your individual view.