Click "Organize Pages" as shown in the picture.

Click "Organize Main Pages"

Organize Main Pages:
You can drag to change place of main pages.

Organize Main Pages:
You can also delete the page from here.

Organize Main Pages:
Click on "Organize subpages"

Organize subpages:
Here you can change the suppages order by dragging.

Click "Organize Image Galleries" as shown.

Organize Image Galleries:
Click on "Organize gallery images" as shown.

Organize Gallery Images:
You can change the order of images using this option.

Click "Organize Store" as shown in the picture.

Organize Store:
Click "Organize Store products".

Organize Store products:
Here you can change order of products by using this organizer.