One of the most common actions, perhaps, is setting values in input fields. The most common use for this is the Set Value action. Besides it, you can use Keyboard Emulation.
With these actions, you can enter both plain text and text from variables.
An example of what the settings for a set value action might look like:
You can add a value setting action in several ways:
manually by adding it to the project via the context menu and filling in all the settings;
through the action designer;
enable Record and start filling in the fields. ZennoPoster will automatically create an action with the necessary data: