HowTo Insert different formats of page number in OpenOffice

The scenario of this exercise is this:
You want to create a text document which is divided into 3 sections: cover page without page number, table of content with i, ii, etc style of page number, and main body with 1, 2, etc style of page number.
Below are the steps how to insert different formats of page numbers:
1. Open a new empty document
2. Open "Styles and Formatting" dialog by Format>Styles and Formatting or F11
3. Click on "Page Styles" (the 4th box from the left)
4. Right click on the empty space, click "New"
4. Give for example "Cover" for the name
5. Create a new style again (step 4), give the name "table of content"
6. Click "Footer", check "Footer on"
7. Click "Page", and choose i, ii, iii as Format
8. Repeat step 5,6,7 with different name, for example "main body", then choose 1, 2, 3 as format
9. Now it's time to apply the styles we made
10.Create 3 sections by inserting page break. Insert>Manual Break>Choose "table of content" for the style, change "page number" to 1 (or as you like). Do it again, Insert>Manual Break>Choose "main body" for the style, change "page number" to 1 (or as you like).
11. Put click on the footer, Insert>Field>Page Numbers

That's all what you need.