Add them as background images in the table headers.
Table JSON
[
{
"type": "ia.display.table",
"version": 0,
"props": {
"data": [
{
"city": {
"value": "Folsom",
"editable": true,
"style": {
"backgroundColor": "#F7901D",
"classes": "some-class"
},
"align": "center",
"justify": "left"
},
"country": "United States",
"population": 77271
},
{
"city": "Helsinki",
"country": "Finland",
"population": 635591
},
{
"city": "Jakarta",
"country": "Indonesia",
"population": 10187595
},
{
"city": "Madrid",
"country": "Spain",
"population": 3233527
},
{
"city": "Prague",
"country": "Czech Republic",
"population": 1241664
},
{
"city": "San Diego",
"country": "United States",
"population": 1406630
},
{
"city": "San Francisco",
"country": "United States",
"population": 884363
},
{
"city": "Shanghai",
"country": "China",
"population": 24153000
},
{
"city": "Tokyo",
"country": "Japan",
"population": 13617000
},
{
"city": "Washington, DC",
"country": "United States",
"population": 658893
},
{
"city": "Wellington",
"country": "New Zealand",
"population": 405000
},
{
"city": "Delhi",
"country": "India",
"population": 11034555
},
{
"city": "Dhaka",
"country": "Bangladesh",
"population": 14399000
},
{
"city": "Lagos",
"country": "Nigeria",
"population": 16060303
},
{
"city": "Karachi",
"country": "Pakistan",
"population": 14910352
},
{
"city": "Istanbul",
"country": "Turkey",
"population": 14025000
},
{
"city": "Cairo",
"country": "Egypt",
"population": 10230350
},
{
"city": "Mexico City",
"country": "Mexico",
"population": 8974724
},
{
"city": "London",
"country": "United Kingdom",
"population": 8825001
},
{
"city": "New York City",
"country": "United States",
"population": 8622698
},
{
"city": "Tehran",
"country": "Iran",
"population": 8154051
},
{
"city": "Bogota",
"country": "Colombia",
"population": 7878783
},
{
"city": "Rio de Janeiro",
"country": "Brazil",
"population": 6429923
},
{
"city": "Riyadh",
"country": "Saudi Arabia",
"population": 5676621
},
{
"city": "Singapore",
"country": "Singapore",
"population": 5535000
},
{
"city": "Saint Petersburg",
"country": "Russia",
"population": 5191690
},
{
"city": "Sydney",
"country": "Australia",
"population": 208374
},
{
"city": "Abidjan",
"country": "Ivory Coast",
"population": 4765000
},
{
"city": "Dar es Salaam",
"country": "Tanzania",
"population": 4364541
},
{
"city": "Wellington",
"country": "New Zealand",
"population": 405000
},
{
"city": "Los Angeles",
"country": "United States",
"population": 3884307
},
{
"city": "Berlin",
"country": "Germany",
"population": 3517424
},
{
"city": "Jeddah",
"country": "Saudi Arabia",
"population": 3456259
},
{
"city": "Kabul",
"country": "Afghanistan",
"population": 3414100
},
{
"city": "Mashhad",
"country": "Iran",
"population": 3001184
},
{
"city": "Milan",
"country": "Italy",
"population": 1359905
},
{
"city": "Kiev",
"country": "Ukraine",
"population": 2908703
},
{
"city": "Rome",
"country": "Italy",
"population": 2877215
},
{
"city": "Chicago",
"country": "United States",
"population": 2695598
},
{
"city": "Osaka",
"country": "Japan",
"population": 2691742
},
{
"city": "Bandung",
"country": "Indonesia",
"population": 2575478
},
{
"city": "Managua",
"country": "Nicaragua",
"population": 2560789
},
{
"city": "Paris",
"country": "France",
"population": 2229621
},
{
"city": "Shiraz",
"country": "Iran",
"population": 1869001
},
{
"city": "Manila",
"country": "Philippines",
"population": 1780148
},
{
"city": "Montreal",
"country": "Canada",
"population": 1649519
},
{
"city": "Guadalajara",
"country": "Mexico",
"population": 1495189
},
{
"city": "Dallas",
"country": "United States",
"population": 1317929
},
{
"city": "Yerevan",
"country": "Armenia",
"population": 1060138
},
{
"city": "Tunis",
"country": "Tunisia",
"population": 1056247
}
],
"enableHeaderGroups": true,
"columns": [
{
"field": "city",
"visible": true,
"editable": false,
"render": "auto",
"justify": "left",
"align": "center",
"resizable": true,
"sortable": true,
"sort": "none",
"filter": {
"enabled": false,
"visible": "on-hover",
"string": {
"condition": "",
"value": ""
},
"number": {
"condition": "",
"value": ""
},
"boolean": {
"condition": ""
},
"date": {
"condition": "",
"value": ""
}
},
"viewPath": "",
"viewParams": {},
"boolean": "checkbox",
"number": "value",
"progressBar": {
"max": 100,
"min": 0,
"bar": {
"color": "",
"style": {
"classes": ""
}
},
"track": {
"color": "",
"style": {
"classes": ""
}
},
"value": {
"enabled": true,
"format": "0,0.##",
"justify": "center",
"style": {
"classes": ""
}
}
},
"toggleSwitch": {
"color": {
"selected": "",
"unselected": ""
}
},
"nullFormat": {
"includeNullStrings": false,
"strict": false,
"nullFormatValue": ""
},
"numberFormat": "0,0.##",
"dateFormat": "MM/DD/YYYY",
"width": "",
"strictWidth": false,
"style": {
"classes": ""
},
"header": {
"title": "",
"justify": "left",
"align": "top",
"style": {
"classes": "",
"backgroundImage": "url(\"/system/images/Builtin/icons/48/logic_and.png\")",
"height": "60px",
"backgroundRepeat": "no-repeat",
"backgroundPosition": "bottom"
}
},
"footer": {
"title": "",
"justify": "left",
"align": "center",
"style": {
"classes": ""
}
}
},
{
"field": "country",
"visible": true,
"editable": false,
"render": "auto",
"justify": "auto",
"align": "center",
"resizable": true,
"sortable": true,
"sort": "none",
"filter": {
"enabled": false,
"visible": "on-hover",
"string": {
"condition": "",
"value": ""
},
"number": {
"condition": "",
"value": ""
},
"boolean": {
"condition": ""
},
"date": {
"condition": "",
"value": ""
}
},
"viewPath": "",
"viewParams": {},
"boolean": "checkbox",
"number": "value",
"progressBar": {
"max": 100,
"min": 0,
"bar": {
"color": "",
"style": {
"classes": ""
}
},
"track": {
"color": "",
"style": {
"classes": ""
}
},
"value": {
"enabled": true,
"format": "0,0.##",
"justify": "center",
"style": {
"classes": ""
}
}
},
"toggleSwitch": {
"color": {
"selected": "",
"unselected": ""
}
},
"nullFormat": {
"includeNullStrings": false,
"strict": false,
"nullFormatValue": ""
},
"numberFormat": "0,0.##",
"dateFormat": "MM/DD/YYYY",
"width": "",
"strictWidth": false,
"style": {
"classes": ""
},
"header": {
"title": "",
"justify": "left",
"align": "top",
"style": {
"classes": "",
"backgroundRepeat": "no-repeat",
"backgroundImage": "url(\"/system/images/Builtin/icons/48/oszillograph.png\")",
"height": "60px",
"backgroundPosition": "bottom"
}
},
"footer": {
"title": "",
"justify": "left",
"align": "center",
"style": {
"classes": ""
}
}
},
{
"field": "population",
"visible": true,
"editable": false,
"render": "auto",
"justify": "auto",
"align": "center",
"resizable": true,
"sortable": true,
"sort": "none",
"filter": {
"enabled": false,
"visible": "on-hover",
"string": {
"condition": "",
"value": ""
},
"number": {
"condition": "",
"value": ""
},
"boolean": {
"condition": ""
},
"date": {
"condition": "",
"value": ""
}
},
"viewPath": "",
"viewParams": {},
"boolean": "checkbox",
"number": "value",
"progressBar": {
"max": 100,
"min": 0,
"bar": {
"color": "",
"style": {
"classes": ""
}
},
"track": {
"color": "",
"style": {
"classes": ""
}
},
"value": {
"enabled": true,
"format": "0,0.##",
"justify": "center",
"style": {
"classes": ""
}
}
},
"toggleSwitch": {
"color": {
"selected": "",
"unselected": ""
}
},
"nullFormat": {
"includeNullStrings": false,
"strict": false,
"nullFormatValue": ""
},
"numberFormat": "0,0.##",
"dateFormat": "MM/DD/YYYY",
"width": "",
"strictWidth": false,
"style": {
"classes": ""
},
"header": {
"title": "",
"justify": "left",
"align": "top",
"style": {
"classes": "",
"backgroundRepeat": "no-repeat",
"backgroundImage": "url(\"/system/images/Builtin/icons/48/wrench.png\")",
"height": "60px",
"backgroundPosition": "bottom"
}
},
"footer": {
"title": "",
"justify": "left",
"align": "center",
"style": {
"classes": ""
}
}
}
]
},
"meta": {
"name": "Table_0"
},
"position": {
"basis": "299px"
},
"custom": {}
}
]