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The tooltip displayed is known as an 'uber' tooltip and is not modifiable by design.  If you do a search on the Ideas Exchange for 'uber' you can upvote the existing idea there to allow for modification of it, and as most people desire, the removal of it in some cases. 

If this response answered your question, please mark it as an Accepted Answer? 

This way, others searching for similar solutions will find the answer faster in the future.

Best, Don Wise (Tableau Ambassador)

@Fiona Crocker

Hi, you may create a double axis chart (synchronized axis) and use the Range option to simulate a reference line:

Range Option basically is used to create like a gannt chart, where you can set the size of the bar (In this example I used AVG(-1000), however I recommend some kind of calculated field. Why? If the value is small the bar/line will not be rendered, if it is really big, it will look like a bar, not like a line) 

Thus, this is a workaround!! The right solution is to create the idea like you have done. 

If this post resolves the question, would you be so kind to "Accept this Answer"?. This will help other users find the same answer/resolution and help community keep track of answered questions. Thank you. 

Regards, 

Diego Martinez 

Tableau Visionary and Tableau Ambassador 

I understand this topic might have already been resolved, but as part of my own learning and practice, I would love to share a solution that worked perfectly for me. I hope this adds value to the thread! 

Yes, this is absolutely possible using Tableau’s standard features! You can achieve this dynamic layout where the Category chart automatically stretches to 100% width and then shrinks to make room for the Sub-category chart.

The secret lies in combining a Horizontal Container, a Dashboard Filter Action, and carefully managing the container properties (specifically, unpinning the fixed widths).

Here is the complete step-by-step guide to setting this up:

Step 1: Build the Dashboard Layout

1. Create a new Dashboard.
2. From the Objects pane on the left, drag and drop a Horizontal Container onto the dashboard.
3. Drag your Category chart into this container.
4. Drag your Sub-category chart and drop it inside the same Horizontal Container, right next to the Category chart.
5. Crucial Step 1: Right-click the title of the Sub-category chart and select Hide Title. (If the title remains visible, the worksheet will not shrink completely to 0 pixels).
6. Crucial Step 2: Click on your Category chart on the dashboard, click its drop-down menu (the small inverted triangle), and make sure Fix Width is NOT checked (unpinned). Do the exact same for the Sub-category chart. This allows both sheets to resize dynamically based on data availability.

Step 2: Configure the Dashboard Action

1. Go to the top menu and select Dashboard > Actions...
2. Click Add Action > Filter...
3. Configure the settings as follows:
   • Source Sheets: Check only your Category chart.
   • Run action on: Select Select (Click).
   • Target Sheets: Check only your Sub-category chart.
   • Clearing the selection will: Select Exclude all values (This is the rule that completely empties the sheet when unselected).
   • Target Fields: Select All Fields.
4. Click OK.

Pro-Tip for Perfect Layout:

If you want both charts to take up exactly 50% and 50% of the space when a category is selected, select the Horizontal Container itself (the outer blue frame), click its drop-down menu, and select Distribute Contents Evenly.

How it works:

• Initial/Default View: Since no specific category is clicked, the Sub-category chart has 0 rows of data. Because the title is hidden and "Fix Width" is unchecked, its width drops to 0 pixels. This forces the Category chart to automatically expand to fill 100% of the container.
• When Clicked: The Sub-category chart populates with bars and naturally takes up its fair share of the container, causing the Category chart to gently shrink and sit beautifully side-by-side with it.

Hope this helps, and I'd love to hear if this approach works for your future dashboard designs as well! 

Best regards, 

Keisuke TASAKA / DATA Saber Apprentice

Hi, @Andrzej Polachow

Are you looking for something like the attachment? Please take a look. 

I represented it using a dual-axis chart. 

<sample>  

You can also add columns in the same way.

 <sheet setting>  

 <label setting>

I have implemented the solution for day and week. Check the updated workbook attached.