The bottom actionmenu gives you additional options and looks like this:
Add – This button allows you to add images to the selected gallery. Here you may upload an image you wish to add to the selected gallery plugin. You may also add a description of the image.
Editor – This button allows you to edit the specific image. The same screen shows as when using Add, but instead of adding a new pictures item, here you just edit an already existing one.
Reorder – This button allows you to reorder the items on your in the chosen gallery plugin list. You may change the order by clicking and holding the field you want to move and then dropping it beside the field you would like to see it. After reordering your pictures you should press the Save button if you wish to keep your changes. Pressing the Apply button works the same as the Save button, but instead of going out of the Reorder mode it you will remain in it.
Delete – This button deletes the selected gallery item.
Cancel – This button takes you out of this section of your CMS.
These are all the available options of the gallery plugin. After creating your plugin you can now add it to a webpage using the Edit grid and Edit functions in the Edit mode. A specific item can be added in the same way as other plugins.