How can I locate the HMTL or Class definitions of a particular template on my wordpress site?

I’m using a WP theme and want to simply rename a label. The search query shows ‘search jobs’ whereas I want ‘search’ only. Here is a link to the page: https://serialphotography.com/events/?search_keywords=Circle&search_location=&search_category= I’ve accessed the theme editor in WP but this only shows the PHP files, I believe the PHP calls on the HTML. In file…