In the Robot Editor, you can configure the Tag Finders of the current step in several ways. The first way is to configure it manually. Once configured (whether automatically or manually), you can click the icon in the Page View to see the tag found by the Tag Finder.
The second way to configure the Tag Finders is to select a tag in the Page View and click the icon. This will configure the Tag Finder to find the selected tag using a tag path in simple mode.
The third way is to right-click on a tag in the Page View and then select an action from the pop-up menu that appears. If you select "Use Tag" from the menu, the Tag Finder will be configured to find the right-clicked tag using a tag path in simple mode. Similarly, if you choose another action from the menu, this will select a corresponding step action and configure the Tag Finder to find the right-clicked tag.
The fourth way to configure the Tag Finders is to select a new step action. Some actions, when selected, configure the Tag Finders so that they find the tags typically used for that action. For example, the Submit Form action will use one Tag Finder and set its tag path to "form" to locate the first <form>-tag in the page.