Lasso
Function Description: The Pickup by Lasso function allows users to move the mouse sleeve to select a series of vector objects.
steps
1.Click Lasso 
button in the Vector Editor, select a key point with the left mouse button, hold down the left mouse button and drag to form an area, and finally release the left mouse button, the vector in the area and its intersection 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.
Lasso selection vector
Lasso selection vector - vector tree
Note: Select the shortcut key to copy, delete and other operations are the same as Pickup Vector.