To copy or move images to another gallery, navigate to Gallery > Manage Galleries > [select gallery to edit] > select all or individual images to copy/move > under bulk actions select ‘Copy to’ or ‘Move to’. Next, click ‘Apply’ . :
(you can also manage your galleries in the ‘Add Gallery’ window in your post or page 🙂 )
A pop up window will appear where you will select the gallery to copy/move images to. Once the process is complete, be sure to click ‘save changes’ ! 🙂