Background images or URL actions?
When using images in Tableau, you are probably thinking about using one of the following options:
- Background images
- URL actions
However, there are some disadvantages in both options. Background images are nice, but not really suitable for showing images. First of all, it will highly increase the size of the dashboard, while we are loading many pictures into the dashboard. Next to that, the image quality will also be impacted when using Tableau Public.
URL actions can work perfectly, but do have one main disadvantage; they do not work across multiple dashboards. When you are filtering or clicking on a dashboard to change the image; this image will not be changed on another dashboard within the same workbook.
The solution can be found in a combination of parameter actions and a web page object.
Why should you choose a parameter action and not a URL action?
With a URL action you can select as Target a web page object that is located on the same dashboard. You don’t have the possibility to select from a different dashboard.
By using a parameter action, you do have the possibility to select one image from different dashboards. You will then use the images as input for the parameter and you can select over different dashboards the images you want to show.