The basic settings of Ditty Posts Ticker only allows you to choose a single post type. You can override this setting to create a ticker that displays multiple post types by activating the Advanced options and adding custom Query arguments (the selected post type will not matter if you override it using Query args).
- Activate the Advanced options
- Add the following to a row of Query args:
- Parameter: post_type
- Value (add post types separated by commas): post_type_1, post_type2, post_type_3
- Create array (you must create an array out of the Value): Select Split list
- Save your ticker