Use drillthrough in Power BI Desktop
With drillthrough in Power BI Desktop, you can create a page in your report that focuses on a specific entity such as a supplier, customer, or manufacturer. To use drillthrough, you select it by right-clicking a data point in other report pages, and then drilling through to the focused page to get details that are filtered to that context.
To use drillthrough, create a report page that has the visuals you want for the type of entity that you're going to provide drillthrough for.
For example, suppose you want to provide drillthrough for manufacturers. For this case, you might create a drillthrough page with visuals that show total sales, total units shipped, sales by category, sales by region, and so on. That way, when you drill through to that page, the visuals will be specific to the manufacturer you selected.
Then, on that drillthrough page, in the Fields section of the Visualizations pane, drag the field for which you want to enable drillthrough into the Drillthrough filters well.
When you add a field to the Drillthrough filters well, Power BI Desktop automatically creates a back button visual. That visual becomes a button in published reports. Users who consume your report in the Power BI service use this button to get back to the report page from which they came.
Use your own image for a back button
Because the back button is an image, you can replace the image of that visual with any image you want. It will still operate as a back button so that report consumers can go back to their original page.
To use your own image for a back button, follow these steps:
On the Home tab, select Image. Then, locate your image and place it on the drillthrough page.
Select your new image on the drillthrough page. Under the Format image pane, set the Action slider to On, and then set the Type to Back. Your image now functions as a back button.
Now users can right-click a data point in your report and get a context menu that supports drillthrough to that page.
When report consumers choose to drill through, the page is filtered to show information about the data point on which they right-clicked. For example, suppose they right-clicked on a data point about Contoso, a manufacturer, and selected to drill through. The drillthrough page they go to is filtered to Contoso.
Pass all filters in drillthrough
Beginning with the May 2018 version of Power BI Desktop, you can pass all applied filters to the drillthrough window. For example, you can select only a certain category of products and the visuals filtered to that category, and then select drillthrough. You might be interested in what that drillthrough would look like with all those filters applied.
To keep all applied filters, in the Drillthrough section of the Visualizations pane, set Keep all filters to On.
In versions of Power BI Desktop that were released before May 2018, the behavior is the same as having this toggle set to Off.
When you then drill through on a visual, you can see which filters were applied as a result of the source visual having temporary filters applied. In the Drillthrough section of the Visualization pane, those transient filters are shown in italics.
Although you could do this with tooltips pages, that would be an odd experience because the tooltip wouldn't appear to be working properly. For this reason, so doing so with tooltips isn't recommended.
Add a measure to drillthrough
Besides passing all filters to the drillthrough window, you can also add a measure or a summarized numeric column to the drillthrough area. Drag the drillthrough field to the Drillthrough card to apply it.
When you add a measure or summarized numeric column, you can drill through to the page when the field is used in the Value area of a visual.
That's all there is to using drillthrough in your reports. It's a great way to get an expanded view of the entity information that you selected for your drillthrough filter.
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