The toolbar of the image viewer shows a button to add or replace an image ('plot').
The option 'Create new plot' doesn't work when the viewer shows a single image without the 'grid'/'single' image expand mode toolbar (that happen for example in Gator but can be seen in demo page higher level API test).
The lock image feature is also not needed when only one image is shown.
The toolbar is different in Gator in OPS than it is in the migrated version. Please check the inconsistency and fix the toolbar.
9/7/2016 Xiuqin WU
After discussion today, the decision is to make the "Create new plot" option work when the "Add image" icon (the one with + sign)
in both the normal mode and expanded mode. Leave the lock icon as is.