1. Drag the orange square over the blue square
2. Press the relevant modifier keys for your platform
3. Continue dragging over the pink square
4. Release the drag, then the keys
5. Check that the correct drop effect is produced in each case. If the mouse cursor can change to indicate the final type of drop effect that will take place, it should change to the relevant type (the one in bold) once the modifier keys are pressed.

Windows

Modifier	Drop effect
None	copy
Ctrl	copy
Shift	copy=>move=>none
Alt	copy=>link=>none
Ctrl+Shift	copy=>link=>none
Ctrl+Alt	copy
Alt+Shift	copy
Ctrl+Alt+Shift	copy

Unix/Linux

Modifier	Drop effect
none	copy
Ctrl	copy
Shift	copy=>move=>none
Alt	copy
Ctrl+Shift	copy=>link=>none
Ctrl+Alt	copy
Alt+Shift	copy=>move=>none
Ctrl+Alt+Shift	copy=>link=>none

Mac

Modifier	Drop effect
none	copy
Ctrl	copy
Shift	copy
Option/alt	copy
Command	copy=>move=>none
Ctrl+Shift	copy
Ctrl+Option	copy
Ctrl+Command	copy=>move=>none
Shift+Option	copy
Shift+Command	copy=>move=>none
Command+Option	copy=>link=>none
Ctrl+Shift+Option	copy
Ctrl+Shift+Command	copy=>move=>none
Ctrl+Command+Option	copy=>link=>none
Shift+Command+Option	copy=>link=>none
Ctrl+Shift+Command+Option	copy=>link=>none