From the front end of a page, is there a Toolset Form functionality to create or edit existing posts that includes an Image upload field that can browse and select an image file from the site's own media gallery as well as an external file source?
Yes, this is possible with Toolset Forms.
https://toolset.com/documentation/getting-started-with-toolset/publish-content-from-the-front-end/forms-for-creating-content/
Media from the system can be added by adding the "Allow Media Insert Button in Post Content Rich Editor", and by adding Fields of Image type in Types, and later adding them to the Form, this will allow uploading media
Or, you can simply let users paste URL's to external Media into URL fields, Attachment Fields or Single Line fields.
Of course, that media won't be uploaded but only displayed, as WordPress cannot upload external media like this.
Hi - Thank you for this information. But I followed it exactly and it doesn't seem to be working for me. It would be great to know what I am doing incorrectly.
Hello,
Please check these:
1) The option "Allow Media Insert Button in Post Content Rich Editor" works only in the post body shortcode, for example:
[cred_field field='post_content' output='bootstrap']
It will be able to render a "Add Media" button in front-end, click it, you can select existed image files from your website media library.
2) The current logged-in user does have access to media library, for example, install the Access plugin,
Dashboard-> Toolset-> Access control-> Custom Roles
enable advanced mode
find and Change permissions of the custom user role, in section "General capabilities", enable option "upload_files", and test again.