This time we’re going bigger than ever. Fabric, Power BI, SQL, AI and more. We're covering it all. You won't want to miss it.
Learn moreLevel up your Power BI skills this month - build one visual each week and tell better stories with data! Get started
I created a custom JSON theme. It contains slicer information as follows:
"slicer": {
"*": {
"data": [
{
"mode": "Dropdown"
}
],
"items": [
{
"textSize": 14,
"fontColor": {
"solid": {
"color": "#666666"
}
},
"background": {
"solid": {
"color": "#FFFFFF"
}
}
}
],
"header": [
{
"textSize": 15,
"fontColor": {
"solid": {
"color": "#666666"
}
}
}
],
"selection": [
{
"singleSelect": false
}
],
"background": [
{
"show": true,
"solid": {
"color": "#000000"
},
"transparency": 0
}
]
}
}However, when I insert a new slicer, it always picks "Vertical List", and I then have to manually go to slicer settings/options and reset the style to default. When I do that, the slicer style then displays "Dropdown".
Any input is greatly appreciated.
Hi @SDittmannFleet ,
Please try below steps:
1. Verify JSON Syntax:
Ensure that the JSON theme file is correctly formatted and that there are no syntax errors. You can use online JSON validators to check the syntax.
2. Check Power BI Version:
Make sure you are using the latest version of Power BI Desktop, as there might be updates or fixes related to theme application.
3. Reapply the Theme:
Try reapplying the theme after inserting the slicer to see if it changes to the "Dropdown" mode.
4. Check for Overrides:
Ensure that there are no other settings or themes applied to the report that might be overriding the slicer mode.
5. Test with a New Report:
Create a new report and apply the theme before adding any slicers to see if the issue persists.
Best regards,
Community Support Team_Binbin Yu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
None of these make any difference. From what I have seen online, it is a bug.
Check out the April 2026 Power BI update to learn about new features.
Sign up to receive a private message when registration opens and key events begin.
If you have recently started exploring Fabric, we'd love to hear how it's going. Your feedback can help with product improvements.
| User | Count |
|---|---|
| 30 | |
| 24 | |
| 23 | |
| 17 | |
| 17 |
| User | Count |
|---|---|
| 61 | |
| 35 | |
| 30 | |
| 23 | |
| 22 |