How do I select/move multiple albums or events in the Photos sidebar? I like the new sidebar in Yosemite Photos. But after upgrading to Photos from iPhoto on my iMac, I have literally dozens of "Events" that need to be moved into "Albums." 

With other sidebar windows (like Finder), I can hold down "command" or "shift" and select multiple folders at once; that does not seem to work in Photos. I do not want to move each event separately. Every time I try to drag or select more than one event/album, it defaults to one selection.

How can I select more than one event/album at once?
Any help greatly appreciated!
You can utilise album view as prior suggested and then drag albums into the sidebar to achieve the desired result, but you are absolutely correct in noting the failure of this desired behaviour to operate, purely within the sidebar itself.
yup the OSX HCI / UX toolbox in terms of standardisation of elements with predictable results is something that apple has debased since leaving OS9, selectable text OS wide - has similar issues.