Did you know?

In the Post Submission form, you can only use individual File Upload fields, as you will have to add custom fields to your posts and there is no custom field type to store multiple files. However, if you will upload images only, then you can use the Image Gallery custom field and use multiple Upload Files field in your post submission form. In case it helps, we have a great tutorial on how to create a post submission form in WPForms
It receives a whole series of events for keystrokes, selections, validation and formatting. The Combo Box Properties Dialog (Figure 2) has locations (tabs) to enter scripts for all these events. For this tip only a single event is needed (the Change Event) since it is only necessary to know when a new selection has been made