From Scribus Documentation Project
Pagination in Scribus is quite different from word processors. It's a bit more difficult, but at the same time more flexible.
Inserting Page Numbers
Inserting a page number in Scribus is quite easy. Simply create a new text frame, double-click to turn into the edit mode, and enter Ctrl+Alt+Shift+P (might not work with some keyboards, but you can choose your own shortcut in Preferences) or use Insert > Character > Page Number. On master pages (see above), the page number will be indicated by a # – this is a special character, and not the same as Shift+3.
You need to insert one placeholder for each digit of the page number, i.e. # for 1–9, ## for 10–99, ### for 100–999 etc.
Here is a depiction of how your page numbering will align from page to page, using a scheme in which we have used ## for 1–99, and also right-justified in the text frame. As you can see, in spite of right-justification, the single digit uses the left-hand #, so there is a space afterward. If you want to have the last digits of the page numbers aligning (eg, the 1 of Page 1 aligning with the 8 of Page 28), you will need separate page numbering for each number of digits.
Automatic Creation of Page Numbers for Each Page
If you want to let Scribus add page numbers automatically for each page, you can use master pages (Edit > Master Pages). Create a master page for left and right, and add a text frame with placeholders for the page number (Ctrl+Alt+Shift+P). Then apply these page templates to all pages in your document. You will need separate master pages for pages 1–9, 10–99, 100–999 etc.
Changing the Numbering Scheme
To change the numbering scheme, you need to open the Document Setup dialog. In “Sections” you can now create numbering sections for your document (see Screenshot). Let's assume you have an introduction on the first three pages that you want to be numbered with capital letters, and your text starts at page 5 with 1. Page 4 will not have a number at all. The first section is already there. You can enter a name for it in the “Name” column. In the “From” column enter “1” and in “To” enter “3”. Choose “A, B, C” as a style, and the “Start” value is “1”. To add new sections, simply add a new row by clicking “Add”. For page 4 the values are: “From” = 4, “To” = 4, Style (doesn't matter here), “Start” (doesn't matter here). It's important that you uncheck “Shown” in the second column. For the main text, the values are: “From” = 5, “To” = (insert the number of pages you need), “Style” = 1, 2, 3, and “Start” = 1. That's all, your document will be paginated as desired.