--- title: "Parameter Use: Zoom In/Out on Chart" description: Have you ever needed to zoom in and out on a graph before? It’s a lot simpler than you may think. Megan explains how to add this feature to your dashboard. image: https://godatadrive.com/hubfs/Imported_Blog_Media/ZoomParam.png --- 1 min read # Parameter Use: Zoom In/Out on Chart [![Picture of Megan Lukonen](https://godatadrive.com/hubfs/Megan-L-Headshot.png) Megan Lukonen ](https://godatadrive.com/blog/author/meganlgodatadrive-com) Jul 1, 2020 [Tableau](https://godatadrive.com/blog/tag/tableau) [Dashboard Development](https://godatadrive.com/blog/tag/dashboard-development) [How To...](https://godatadrive.com/blog/tag/how-to) [Data Science](https://godatadrive.com/blog/tag/data-science) [Human Centered Design](https://godatadrive.com/blog/tag/human-centered-design) [Helpful Resources](https://godatadrive.com/blog/tag/helpful-resources) [Design](https://godatadrive.com/blog/tag/design) [Data Visualization](https://godatadrive.com/blog/tag/data-visualization) [DataFam](https://godatadrive.com/blog/tag/datafam) [DataDrive](https://godatadrive.com/blog/tag/datadrive) ![Parameter Use: Zoom In/Out on Chart](https://godatadrive.com/hubfs/Imported_Blog_Media/ZoomParam.png) Have you ever had the need to zoom in and zoom out on a chart? Have you needed to be able to see the intricate peaks and valleys, yet also see the big picture?  ![GIF of line chart](https://lh4.googleusercontent.com/B6QoBWj-r2SJk2jeunGlWiwEc_4_1Nf0wzVfecO19ghztNGAflKFjUPbPzJHZskSmbPu9EeXsE6HEgtwqIMtIBuRs2TQYHOaeOERD3sLj8jGTAJthKIqe2uCBVKNp0WbzTa3hyg) In 5 simple steps, your users will have the ability to easily zoom in and out of your line charts.   --- ## Step 1: Create Parameter Create a string parameter using a list for allowable values. The parameter will be how your users interact with the chart. ![Window to create parameter](https://lh4.googleusercontent.com/QM4rFECY68-0BqcNquaWqGicHFH4iVF_qITrFEFvmXr_WiN52sGH95gV0A6nIUFLRiv3StxbrjWpx2pW7nD3TjvN8DrkZWslSS_y-4tvfyAGQJrRyCSg5MqpRVGFHY8GhGvKnP0) ## Step 2: Create Calculation This calculation will turn on and off the 0 axis once all 5 steps are completed. **Graph View Calc** CASE [Graph View]   WHEN "FULL VIEW" THEN 0   WHEN "DETAILED VIEW" THEN NULL   END ## Step 3: Create Line Chart Create your line chart as you typically would, but then drag Graph View Calc (created in step 2) onto the Detail marks card. ![Create Line Chart](https://lh6.googleusercontent.com/L1W1n3qlcK6IauATNmbIWziHa_DNMcsgk6AF4GA88yVenCalChRPv-6-oAcghhDOVAMxYoCLFCYu867qF9iwNPi2pYMexj4rSFKsN32M60BYA7VfKYTUqraWHeOJm8D7PAr9d_w) ## Step 4: Create Reference Line Using the Analytics tab, drag “Reference Line” onto your chart. In the edit window, change the following: - Change *line value *to SUM(Graph View Calc) - Change *line label* to None - Change *line tooltip* to None - Change *formatting line *to None **We want this line to be invisible to the user! ![Window to create reference line](https://lh5.googleusercontent.com/zdeg3-11i-5B2dB5sIVrdwzdH5tqjugYUC9omJrv78jhipdcvBXVZafCVUiFQlLxswSt8kU2P4CL0DWSgznji878VAxBJ44tb8eTyrSMDHxuieMCvKkf_KQFKczm1eE3CKupgwc) ## Step 5: Final Step The final and most important step to making this work:  - Right click on your vertical axis and select Edit Axis.  - Uncheck the box to Include Zero.  Our calculation from step 2 will tell the chart when and when not to include zero for us! ![Window to edit axis, do not include zero](https://lh5.googleusercontent.com/OSkgm4jfwCBNfs7uIISpuTe9KhXzecQgETOQ7c4KwXhHkpDY-5BY-R4XoBP7Kfy34pke5ft5528krDLkqCXA5VlwL7FDW2WHnbI_IR-5Hb9fC55UKiZ0V5HWp8WCix6KZ8KMfKY) When you create your dashboard, make sure to show the parameter so that your users can take advantage of this cool new feature. ### *That’s it! 5 easy steps to give your users the ability to zoom in and out as needed.*   --- ## Explore More - [Tweet](https://twitter.com/share) [![Tableau Conference 2025 | Know Before You Go](https://godatadrive.com/hubfs/DataDrive%20Blog%20Images%20(1)-2.gif) ](https://godatadrive.com/blog/tableau-conference-2025) #### [Tableau Conference 2025 | Know Before You Go](https://godatadrive.com/blog/tableau-conference-2025) ![Picture of Luke Komiskey](https://godatadrive.com/hs-fs/hubfs/luke-1.png?width=30&name=luke-1.png) [Luke Komiskey](https://godatadrive.com/blog/author/luke-komiskey): Jan 20, 2025 If you’re a data enthusiast, analytics professional, or just someone curious about Tableau’s latest innovations, the Tableau Conference 2025 is your... 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