Yes. In OSList 1.9.4 you can create and delete categories.
To create it click on "create new category" icon on tool bar.
To delete - select proper sho and select "detete from tree" on context menu.

Yes. In OSList 1.9.4 you can create and delete shop.
To create it click on "create new shop" icon on tool bar.
To delete: group product lisr by shop, select proper shos and select "detete from tree" on context menu.

Changing category icon is supported from version 1.9.4.
To change icon select category, open context menu (by right mouse click) and select "change image" option.
Then navigate to image you want to use and apply change.

You can do it in same way as for category ( paragraph 1) open context menu (by right mouse click) and select "change image" option.
Then navigate to image you want to use and apply change.

Whene you have products groupped by category - products get icons from his shops, if it is groupped by shops, icons are same as group to which belongs products.
This is done to ease select product which can have similar description but different shops/groups.

OSList is designed to hint users where to buy desired products.
Most markets have some products cheap, and other products cost more than in other markets.
If you add to program products for many shops - OSList will help you select best shop for shopping.

Yes. In fact to use advanced features of OSList you should add same products to different shops and in all shop set correct price.
More products will be awailable in different shops, OSList will be more
efficient in optimizing your shoppnig.

You can sent text only lists. Such list are supported by almost every mobile.
To send text lists open Options->properties window, then select "HTML" tab and select "page in clear text format" check box.

Open Options->properties window, then select "print and bluetooth" tab, now select desired size from "Font size" choice list. Click OK.
Next pages you will send will have desired size.