‘Logo’ type fields are used for User Profile only. It is usually used to allow Employers uploading their company logo.
By default fields of this type on input forms are displayed as input box with 'Browse' button to indicate a file to be uploaded, e.g. “Logo” field in Employer User Profile:
In the Display listing page and Company Profile page "picture" type field is displayed the following way:
To edit a ‘logo’ type field in the Admin Panel you need to click on the Edit icon opposite this particular field. E.g. to edit 'Logo' field you need to go to Users > User Groups > Employer > Edit User Profile Fields (link) > Edit 'Logo'
There will be the form opened where you can modify the ‘logo’ type field parameters, set limits for Width and Height of uploading images and select the Storage Method:
Company Info - size of logo displayed on the Company Info block of Display Job and Company Profile pages.
Featured Companies - size of logo displayed on the Featured Companies block (e.g. on the Home page).
After you finished editing the field parameters, press the “Save” button. Use the "Apply" button to save changes and remain on the same page.