Hi again! It is possible to change text of a KPI visualization, but when it comes to adding a "subtitle" under main KPI title, i am afraid it is not. If the main goal is to give more insight/info about the KPI, you can add description that shows more info about it when hovered above question mark. To achieve what I shared as a screenshot, click the three dots → Configuration → Custom >

**Description**

Whatever you put in description in asterisks, it will show when you click on question mark. it is also possible to change font and boldness by applying following in JSON. More information can be found here.

"typography": {
        "font": "url(<https://fonts.gstatic.com/s/crimsontext/v19/wlp2gwHKFkZgtmSR3NB0oRJfbwhTIfFd3A.woff2>)",
        "fontBold": "url(<https://fonts.gstatic.com/s/crimsontext/v19/wlppgwHKFkZgtmSR3NB0oRJX1C1GDNNQ9rJPfw.woff2>)"
    },

It is also possible to change color depending on where you want to change colors. More information can be found. https://www.gooddata.com/docs/cloud/customize-appearance/create-custom-themes/theme-properties/#colors And if you would like to see some theme examples that you would like to mimic, you can also check this documentation. https://www.gooddata.com/docs/cloud/customize-appearance/create-custom-themes/theme-examples/ Thank you.