If you want to add product go to Catalog -> Manage Products. Then click on the "Add new" button in the top right corner. You will see window as follows:
General Product Info
It can be the most tricky part of products display order. Probably you tried to set display order on category page in admin panel and it didn't work. If you want to change the display order of products on categories page or manufacturers page you have to do it here. So please remember about it.
You can add here product pictures. Choose their display order, first will be always main product picture. You can also specify ALT text and Title of image.
Categories Mapping - Select tab "Category Mapping". You will be able to choose to which category product should be assigned.
Manufacturers mapping - Select tab "Manufacturer mapping". You will be able to choose to which manufacturer product should be assigned.
In this tab you can add/edit/remove specification attributes. This tab is described in details in section Specification Attributes.
In this tab you can add/edit/remove product attributes. This tab is described in details in section Product Attributes
It's usefull tool to set different price for products ordered in higher quantity. When customer will add to shopping cart specified quantity of product, GrandNode will automatically change price. Note: You need to save changes in product before managing tier prices.
You can select here which of created discount should be assigned to adding product.
Access Control List, Stores
Access Control List (ACL) - You can specify here which customer role will see this product.
Stores - You can specify here to which store this product will be limited.
Related Products, Cross-sells
Related products - It's very usefull promotion tool. You can select here product which will be shown on product page in "Related products" section.
Cross-sells - this option gives possibility to buy products which go with selected product. For example when you buy bike, you may want to buy helmet or bag. It will be displayed in the bottom of checkout section. You need to save changes before you add cross-sell products.
To track activity log you need to activate this type of activity in Customer -> Activity Log -> Activity Log Types and check actions connected with managing products.
Usefull tool to look which action customers make when they are viewing, buying products.
Purchased with orders
Tab, where you can look at orders in which customers bought this product.