Circle
Function Description: The Pickup by Circle function allows users to use circles to select a series of vector objects.
steps
1.Click Cicle 
button in the Vector Editor, select a key point with the left mouse button, hold down the left mouse button and drag to form a circular display box, and finally release the left mouse button, the vector within the circle and intersecting with the circle will be selected and highlighted. If multiple vectors are selected, a tree-structured dialog box will pop up on the right side of the view, including all currently selected vectors. Clicking the node with the left mouse button will deselect other vectors, and only select the corresponding vector and highlight it.
Circle selection vector
Circle selection vector-vector tree
Note: Select the shortcut key to copy, delete and other operations are the same as Pickup Vector.