Good morning Elena,
What you would have to do is replace the images that are located in the wp-content/uploads/gallery directory of your website with the new images that you want to display.
To upload the new images you can use an FTP program or use the File Manager of the CPanel control panel of your hosting account. The following link explains how to use it:
/blog/item/859-administrador-de-archivos-de-cpanel.html
I recommend that the images you upload have dimensions of 1200×900 pixels.
Cheers
Answered : 11/17/2015 10:07 am