What you should do is open the project that you will use as "master" and simply go to: MENU / SAVE AS, and give it a different name, for example "copy"; You close the project that you have open and now you have two equal albums, one called "master" and another called "copy".
You open the project "copy" this will now be the new album, so delete the pages that you don't want to use (with the cursor on the page you want to delete: click the right mouse button and select "delete sheet").
You may also need to change the order of the pages, I explain how to do it:
You can order the pages, even after the project ends. You can do it but only before order the album. To do this, you just have to go to the page that you want to move to another place and on it: EDIT / MOVING THE SHEET RIGHT (or left), the sheet in front will occupy an anterior or posterior position, depending on the option applied.
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