need 4 icons attached (the last one on the right is already done but you might want to make variations of it)

snap to grid¶

When this is ON, clicking and dragging objects will make the first object's start position snap to the grid

snap to grid and keep offset¶

Same as above, but if eg. the object is 4 ticks away from the grid, the object will be snapped to the grid plus 4 ticks later

snap to events¶

When this is ON, clicking and dragging objects will make the first object's start position snap to the boundaries of other objects or events

snap/grid options¶

Clicking this will bring up the snap/grid options menu