If you're not able to see individual messages in the Alerts and/or Chat areas within the trading room, it's likely that your browser's zoom level has been set to high. That is, your text and general magnification is too big and needs to be set closer to 100%.
Here's what the trading room might look like if your zoom level is too high:
You see a very large options menu at the upper left, and the phone, text, and other icons are very large. Again, this is likely because you've set the zoom level too high in the browser. This can usually be resolved by reducing the zoom level.
The zoom level in many browsers can be changed by holding the CTRL key and rolling the mouse wheel forward or backward if your mouse has one.
If that doesn't work, or if you don't have a mouse wheel, here's where you can change the zoom setting via the browser's settings. Click on the options menu at the upper right, which is often a set of 3 dots or lines (e.g. highlighted in red in the following image). In the menu that pops up, find the Zoom setting (also highlighted in red in the following image). Change that zoom setting to 100%, and see if that resolves the issue. You can then adjust it slightly, e.g. to 125% or whatever is comfortable for you to easily see the screen without making it too big. Note that if your window or screen is too small, it might be hard to see some of the writing, so make sure you've enlarged your window to the full size of your computer's screen. Note that this example is from the Brave browser, which is based on Chrome, and should be about the same. Microsoft's latest browser is also based on Chrome and should look similar.
If it's not the browser that's causing this issue, then you can try resetting the layouts within the trading room. There's an options menu in the upper left of the screen. Click on that options menu (the three stacked lines), then select the Page Layouts menu choice, then the All In One menu choice and that resets the layout to its defaults. Those 3 choices are highlighted in red in the image, below.