There are some input field in the detail view that are all directly related to the category you've added or you are going to edit. Their purposes are:
To add a new image, click on the blue "+" button for a new image item and then into the dotted area. Your browser will then enable you to select a file. It's name will be automatically added as image label. In case there are more image types available, you have to select one. If your image contains text or is specific to a language, you can choose the language it should be shown for in the frontend.
By default, the frontend will display images with these list types. If items with other types are shown depends on the frontend template:
The "Advanced" section of the panel offers additional settings for the image:
The "Advanced" section also contains a list of image properties. These can be any additional information about the image like copyright, year, etc. You can freely add new property types in the corresponding media property type panel.
Each text can have a maximum of 64 thousand bytes which equals 16-64 thousand characters depending on the size of the UTF-8 characters you use. To be most compatible with all platforms/operating systems/browsers, use only UTF-8 encoding. Besides plain text, you can also use HTML code for special markup in the long text field but it's discouraged to do so.
To name and describe the category, you should add at least a name in each language. If other text types are shown depends on the implementation of the frontend. The meta keywords and meta description will be only visible to search engines and the meta description is shown as text in the result list of the search engine.
Products can be added by clicking on the "+" sign which is on the right side in the table header.
First you have to choose a product from the combo box where you can filter the products by typing the first characters of their label. Besides the status of the relation (enabled/disabled) and its type, you can also add a start and end date for products that should be only listed in the category for a limited time. The order of the associated products is determined by the position value and this is also used in the product list of the frontend.
You can also add option/value pairs to each category <> product relation that will be available in the template, e.g. a CSS class for different styling.
By default there are two list types for each entry in the left panel available: