The new Slot tool in Onshape’s sketch toolbar makes creating slots out of lines, arcs, or splines really simple.
To create a slot, select the “Slot” command from the “Offset” dropdown menu.
Then left-click the entity (or entities) you are referencing for your slot.
A dimension is added for the slot offset value. Double-clicking this dimension will allow you to set the amount of offset.
That’s all there is to it! For a closer look, check out the video.