After you have created the appropriate categories, you can start uploading
your images to the system gallery. To upload an image, select 'Image
Manager' from the 'Gallery Manager'. Images if any are displayed in the
'Image Manager' in a paged manner. In the bottom part of the Image
Manager, a section with heading 'Upload Image' can be found and you can
upload your image from here. Select the category your image will fall into.
Browse for your image. Click on upload when you have selected the file. Now
your image is uploaded in to the system gallery. One thing worth noting is that
your file uploaded is renamed while being uploaded. Your file will be prefixed
with 'sg_' on uploading. The name will be a combination of 'sg_' followed by
the current timestamp. As web browsers can handle only gif, jpeg and png
images, upload only gif, jpeg or png images.
To delete one or more images from the system gallery, go to Image
Manager. Select the images you want to delete by checking the check
boxes corresponding to each image you want to delete (the check boxes in
the first column). Click on 'Delete Selected'. If the images are not being used,
they will be promptly deleted. As it is required to check all the sites by all the
users before deleting the images, it may take a long time to complete the
operation sometimes.