Allow direct component pin shorts: Normally you can draw a wire directly through a component and the wire segment shorting pins is deleted. If you check it, the shorting wire will not be automatically deleted.
Automatically scroll the view: Checking this box makes the view of the schematic scroll as you move the mouse close the edge while editing the schematic.
Mark text Justification anchor points: Draw a small circle to indicate the reference point of text blocks.
Mark unconnected pins: Draw a small square at each unconnected pin to flag it as unconnected.
Show schematic grid points: Start with visible grid enabled.
Orthogonal snap wires: Force wires to be drawn in vertical and horizontal segments while drawing. If not checked, a wire can drawn at any angle and will snap to any grid. Holding down the control key will momentarily toggle the current setting while drawing wires.
Cut angled wires during drags: During the Drag command, a non-orthogonal wire will be broken into two connected wires if you click along the middle of the wire
Undo history size: Set the size of the undo/redo buffer.
Draft with thick lines: Increases the all line widths. Useful for generating images for publication.
Show Title Block: For internal use.