Select how to use arrow shortcut keys.

[Ericwln]

When I create a square, then I create several circles and put them in the square. Then connect the lines. Now I want to call a selection tool (I don't know the shortcut key), and then select all these circles and lines and move them. This box is very big, and there will be many big circles nested in it. At this time, I can't make a choice in the box, so I can only jump out and adjust it to the outermost layer before selecting the tool. My demand is that I have a shortcut key (selection tool) and then I can use it in the box and select the range I want to choose, make a selection and move it as a whole; What should I do?