If that is custom functionality in theme options page then it is highly specific to that theme. Likely you will need to edit theme files and/or create child theme. Plus option pages can be simply in WordPress API but just as well can be built with help of theme framework or other kind of third party code.
I think your first stop should be developers of themes and information on how to best work with their option pages.
Related Posts:
- How to set a single theme directory on a multisite blog?
- Customizing 1 theme for multiple blogs in a multisite setup
- Opinions and recommendations on the best barebones base theme [closed]
- Customizing a WordPress theme without changing it?
- How to Link External jQuery/Javascript files with WordPress
- Custom Taxonomy-specific JavaScript
- Any official way to create an admin theme?
- Splitting an Evolving Site into Multiple Sites, or Maintaining as One Site?
- Building useful features into your theme
- Multisite: setting theme and options when a new blog is created
- Change Default Image HTML
- How to delete default themes
- Extra User Profile Field Upload File / Image
- How to move theme directory but not plugins/uploads out of WordPress root directory?
- Edit raw HTML of the landing page
- Problem : deletion failed, the theme requested does not exist
- Theme Activation, Create Database Tables
- Will activating a different theme preserve custom settings to current theme?
- Can I apply a WP theme to a specific custom page template?
- How to trigger function on theme delete?
- Setting a static home page and blog page without using the settings
- Two Navigation Menus – secondary nav is including main nav
- Possible to put header-{your_custom_template}.php in subdirectory?
- Renaming the Twenty Fourteen WordPress theme
- Protect changes made to the theme when updating
- Theme Development Admin Area [closed]
- Is it possible to use WordPress as an online portfolio for text content? What kind of theme would I look for?
- Static page not working
- How can I make a different theme be viewed for logged in users vs guests?
- How can I make some themes usable only by admins?
- Custom options below pages/posts editor?
- What changes we need to make to a theme so it can be installed as a MU Theme?
- Problem of running development copy of WordPress on WebMatrix?
- Different logo on homepage
- the_content() is not displaying content, why? [closed]
- What is the correct way to integrate wordpress with another php application?
- Customizing page content layout
- Is wordpress big enough for my project [closed]
- Tips for managing code when developing a parent theme framework
- Using WordPress Multisite to manage multiple projects?
- Creating a job board using WordPress (for free)? [closed]
- Trying to uninstall a theme, but it’s hijacking my home page
- Most wp_nav_menu parameters ignored
- Using the same database on another Subdomain
- How To Show Different Footers For Different Post Types Pages?
- How to have multiple WordPress Menus
- How to include stylesheet in custom admin using parent_slug
- Custom fields not displaying on front end
- My blog suddenly can’t find my stylesheet?
- Query for all themes?
- Make theme settings support multisite enabled (WordPress Mu) site
- Is there any way to modify images from a theme using the web interface?
- Default and warning messages & no login
- dynamic image path within a javascript file
- Display ads by location [closed]
- WordPress Dashboard Problem [closed]
- Theme Dev | Convert Template to Theme
- Work on theme files on a server & browser preview before installing it
- Create a child Theme or custom Theme
- Theme Options Menu Item – Permission Issue
- Static front page displaying twice
- Static posts page is not working
- Wrong theme being activated
- Is it possible to stop a theme activation when a certain plugin is not activated
- add image size still doesn’t work even after regenerating thumbnails
- A minimalistic admin theme for a WP 3 install
- How to override parent theme function through the child theme [closed]
- How can I develop a new theme in WordPress without disrupting the current site
- Move custom code out of theme’s functions.php file
- How To Modify New Sub Blog Immediately When Super Administrator Creates It?
- Upgrading a custom theme through the Dashboard
- Get list of sites that uses specific plugin or theme
- Themes—Child Themes
- My scripts-bundle.js file is getting sent to the browser as a stylesheet css file. Help!
- Updating Existed RocketTheme Theme on WordPress
- How to customize core admin pages within a theme?
- Style the archives/category sidebar widget via theme
- Port existing Bootstrap site to WordPress?
- Is there a way to override require_once of the main theme on the child theme?
- How to add more default colors?
- Theme folder doesnt exist
- Increase content area width in TwentyFourteen [closed]
- Undefined variable error in theme option after updating theme [closed]
- Cannot add edit themes and add plugins after multisite update
- Comments not displaying after changing theme
- Theme Translation?
- List of categories instead of dropdown menu selector in admin options
- How can I show some standard html code across any theme I install?
- Problem of not changing the front and bottom of the Woodmart template by activating the really simple ssl pro plugin in WordPress
- Please help me clear my confusions about WordPress
- How to narrow the area between buttons on Helium theme sidebar? [closed]
- use a Thumbnail size in post
- Why does WordPress Editor Only Use Half the Box?
- Installing Theme from uploaded file. Not uploaded theme?
- Can i add wordpress editor to my custom theme option? [closed]
- wp_nav_menu in 3.7 add name class nav navbar-nav
- Best way to include pagination in a theme [closed]
- How to change the standard width of a page
- Remove image next to header image on WellExpo theme [closed]
- Adding PHP code to single template in 2023 edition of WordPress theme