▪Simple creating & editing feature in animator mode:

To create simple picker item or edit them for temporary use, you could press "W" key to switch to simple edit mode, or press "Q" to switch back to animator interactive mode, press "Y" to switch between.

Within mode, you could select, move picker items, assign its fill color and label color with the two color buttons above.

Right clicking in this mode, a menu which carries item creating / editing features will pop up.

Red the tool tip of each menu item to know its usage.

 Even In this mode, all edits to picker are not savable, you must press F8 hotkey to switch to Designer mode in order to save all the edit.

When you use picker that designed by riggers, usually you want a temporary space to store the temporary selection.

I suggest you to switch the view layout to "Column2", load your picker at the left area, mouse click to active the right area,

press "CTRL+N" or CTRL+LMB Double clicking to create a temp picker view, and put all the temp picker buttons in that view, by utilizing the creating features in the right click menu in this mode.