Frends Process editor have some keyboard shortcuts:
Arrows: move view
C : Activates Connect tool
E : Add name to element
H : Activates Hand tool
L : Activates Lasso tool
S : Activates Create/remove space tool
Ctrl+C : Copy selected element(s).
Ctrl+V : Paste selected element(s).
Delete: Delete selected element(s).
Holding Ctrl down while selecting elements lets you click and select multiple elements.
Holding Sift down while dragging over canvas lets you select elements within area.
Ctrl+F: Search element in process.
Ctrl+F (inside parameter editor): Opens a search/replace tool.