Besides the provided standard prompt triggers, there are 2 other ways you can use to trigger prompt.
Using Launcher
Launcher can be used to trigger prompt. When launcher is clicked, prompt will be triggered and shown.
Link Trigger
Another approach is to use href link as trigger. This approach allows you to specify link text to trigger prompt.
To get hash for link trigger, go to prompts page and locate prompt. Then select Show Link Trigger.
After that, you will be provided with hash that you can add to link to trigger prompt.