I. Configuring Listing Slider / Listing Grid Image Size
You can configure image size of these shortcodes by clicking on Pages -> [The page contains this shortcode ] -> Edit Listing Slider / Listing Grid -> Image Size / Desktop Image Size.
II. Configuring Taxonomy Image Size
Taxonomy page is Listing Category / Listing Location / Listing Tag page. To configure Image Size of the taxonomy page, please click on Appearance -> Theme Options -> Customize Taxonomies -> Custom Taxonomy Image Size
III. Configuring Search Without Map / Map Image Size
Click on Pages -> That Page -> Search Without Map Settings -> Image Size
IV. Changing Single Listing Image Size
Click on Settings -> Media -> Change Large setting