Please install the ignite gallery module through Joomla’s extension manager. Then go to Joomla’s module manager and select the Ignite Gallery module.
On the left are the standard Joomla module options. On the right hand side, you can choose the Ignite gallery settings. The ‘search child categories’ option determines whether the module should look at child categories of the selected category when selecting images. The ‘add links to images’ option will add a link to each image. The link will go through to the gallery that has that image and display the image.