So, I have recently begun work on an album of 21st Century US Stamps. One of the things that’s insanely useful about properly laid out album pages, is the use of catalog numbers to you identify what you have and what you need. You can design your own album pages and use catalog numbers, but distributing them to others can be a bit tricky.
From my personal experience, Scott will not give you a license to distribute their catalog numbers in album pages you make for others. So what’s a guy to do? USE STYLES!
Styles are a feature in Scribus that lets you set a certain font, size, color. spacing, justification, etc. and then apply those same settings to a text box. You can then set the same style to multiple text boxes. When you change the style, ALL the text boxes assigned to that style change also.
Here’s an example of a stamp with Scott catalog numbers on the bottom:

And here is a part of a page with 3 different Scott numbers:

So, as you can see, you could not give this page to other people. But, luckily I took the trouble to learn about Scribus style sheets and all the catalog numbers have the same style.
So, go to the menu up top and click on Edit and choose Styles:

You will then see a list of styles:

Choose the style for your Catalog numbers and click on Edit:

Click on the Character style tab. Go down to Colors and click on the arrow. Choose White off the list. Click on Apply and then choose Done.
Once that’s done, close the Style window and you’ll see all the catalog numbers are gone:

Now all you need to do is make a PDF file for people. Go to the File menu, choose Export and then choose PDF:

The PDF preflight checker will come up. Just choose to Ignore errors:

The next dialog will prompt you to save the PDF file.

Click on Save and you’ll have a PDF without Catalog numbers!