Slicer to display only applicable values

Something like this was just posted by SWoodring on this post: https://community.fabric.microsoft.com/t5/Desktop/Fix-matrix-filter-once-selected/m-p/3421892#M1136059

I don't know if the user's problem was fixed, but here ya go. 

To achieve the behavior you desire, where clicking on a salesperson in the "Sales by Salesperson" matrix doesn't override the region filter from the "Sales by Region" matrix, you can use a technique called "Sync Slicers" and "Edit Interactions." Here's how you can set this up:

1. Sync Slicers:

   a. In Power BI, go to the "View" tab in the "Visualizations" pane.

   b. Click on "Sync slicers."

   c. In the "Sync Slicers" pane, click on "New" to create a slicer.

   d. Choose a slicer type (e.g., a dropdown or list) that represents the regions. Connect it to the "Sales by Region" matrix.

   e. Name your slicer appropriately, e.g., "Region Slicer."

   f. Adjust the slicer's appearance and position on the page as needed.

2. Edit Interactions:

   a. Go to the "Format" tab in the "Visualizations" pane.

   b. Click on "Edit interactions."

   c. You'll see a set of icons next to each visual on your page. These icons represent the interaction between visuals.

   d. Click on the icon next to the "Sales by Salesperson" matrix.

   e. A menu will appear. Choose "Keep all filters" or "Keep all filters and highlight." This will ensure that when you click on a salesperson, it doesn't override the region filter applied by the "Region Slicer."

   f. Click "Done" to save your changes.

Now, when you click on a region in the "Sales by Region" matrix, it filters the "Sales by Salesperson" matrix, and subsequent clicks on individual salespeople won't affect the region filter.

Hope this help,

Cam