Pick curves-on-surface, locators, image planes, objects with the same shaders, templated objects, and objects from within a group.
You can set the tool to pick only visual curves-on-surface, or only geometry curves-on-surface through the option box.
The image plane floats behind other types of geometry and always remains flat to the computer screen like a background.
Picked image planes display in modeling windows with a highlight around the border.
In the SBD window, picked image planes display with a highlighted border, below their camera.

You can pick image planes in the SBD window using any of these object picking modes:
All surfaces to which that shader has been assigned are automatically picked.
You can pick selection handles (and their target objects) with the Pick > Object
tool. This tool only picks selection handles, allowing you to draw a pick box around lots of objects and only pick the selection handles.