Noob ? Again. Hotkey Q?

[Hector, tamer of horses]

Hi All

Upon looking at the unit selection Hot Keys I can't seem to activate any of the following:

Double-click: select all units of same type: Double Click what?

Shift-click: select multiple units: How does this work?

(click and) w: select all units with afflictions: Click what? And from what menu?

(click and) e: select all units with 2+ experience stars: Click what? And from what menu?

I know it is silly, but I am still learning how this goes.

Also, I am still to figure out what to do with earth magic. I can seem to make many weapons or case much in the way of rituals at E3 or E4, am I missing something?

In a final point, Blood Magic ... I don't know much about it. I have a bunch of B1 people, nothing more. Is there any way of boosting this using B1 mages?

And a final question? How do I know if the 3.23 patch has loaded correctly and does this patch include all from 3.01-3,22?