To adjust the font size and image size in the Island Browser, you can follow these steps:

1. Open Island on your computer.

2. Click on the three vertical dots in the top-right corner of the browser window to open the Island menu.

3. From the menu, select "Settings".

4. In the Settings tab, scroll down and click on "Appearance" to expand additional options.

5. Under the "Appearance" section, you will find the "Font size" option. Click on the dropdown menu next to it.

6. Choose the desired font size from the available options: "Very small," "Small," "Medium," "Large," or "Very large”.

7. Once you have made the desired changes, close the Settings tab.

Please note that these steps may vary slightly depending on the version of Island you are using.