DChat in Dmail DChat Settings: How to Customize Font Size Estimated reading: 1 minute 103 views Step 1: Open DChat and click the Settings icon at bottom left. Step 2: The pop-up window will appear like this as shown below in the screenshot Step 3: Click on “all the chat settings”. Step 4: Click on the drop done arrow of “Font size”.Select the font size according to your choice (small, medium, large and extra-large). Step 5: Click on ” Save changes” at the bottom right corner, your settings will be updated.