So i'm making a map using Radiant and i have my zombie (actor_axis_zombie_ger_ber_sshoner) and i gave it all the keys and values i needed but now when i shift click i cant deselect and i cant copy it either. If anyone can help that would be great.

Escape?

push escape to deselect whatever it is you have selected. push space (with the object selected) to copy and paste whatever it is you have selected