Preference

General program options, such as cursor shape, axis color, zoom factor, and display of coordinate system icons.

Note: You can also use the Cursor menu to change the cursor display.

Zoom Factor: The default zoom step setting is 2, meaning that zooming in doubles or halves the size. See Zooming.

Fixed relative origin: If checked, the relative origin will be fixed while in relative or polar coordinates. If you need to relocate the origin, it must be done manually. See Relative Coordinates and Polar Coordinates.

Geometric select edit: If checked, objects will be selected by their geometric extents, rather than their cosmetic extents. This permits geometrically accurate scaling of objects like double lines and lines that have nonzero width. See Geometric and Cosmetic Select Modes.

Use Choice if several entities in aperture while selection: If more than object lies within the aperture area during a selection, a small window appears from which you can select the desired object.
Undo/Redo:

Undo/Redo depth: Sets the number of operations stored in the Undo buffer.

Include Model / Paper space switch in Undo buffer: If checked, switching between Model and Paper spaces will be included in the Undo buffer.

Old style text output: Revert to the text display feature of older versions of TurboCAD.