Trying to add a separate page in QGIS 3. Since the composer was changed in QGIS 3.x.x I can't find the field for multiple pages that is listed here How to add pages in print composer.
Where did it move?
QGIS Print Composer – Adding Multiple Pages in QGIS Print Composer
print-composerqgis-3
Related Solutions
Yes, it is.
You can change the number of pages in the print composer composition tab in "paper and quality" options.
From that point, you can put items in any of the pages. You can even put several maps if that fits your needs.
As was answered before, changing page orientation is not enough. You also need to resize and move the map item.
Quoting from cited posts (this was for Atlas Feature but could be adapted)
For the item width -> (CASE WHEN bounds_width( $atlasgeometry ) >= bounds_height( $atlasgeometry) THEN 297 ELSE 210 END) - 30
For the item height -> (CASE WHEN bounds_width( $atlasgeometry ) >= bounds_height( $atlasgeometry) THEN 210 ELSE 297 END) - 10
I know answers providing links are not the best but it has been extensively described on two posts on the blog Gis Unchained.
Best Answer
You can insert pages from
Layout -> Add PagesA new dialog will be appear to specify the number of pages and their locations: