Set the antialias options on the Rendering page in the Options dialog.
The Options Dialog
Click the File | Options command to open the Options dialog. Click on the Rendering option on the left side of the dialog to open the Rendering page.
Set the Rendering options in the Options dialog.
Check the box next to Antialias lines to allow redraw to diminish jagged edges and create a smooth appearance for all lines in the plot window. Uncheck this box to disable the smoothing and make lines crisper.
Check the box next to Antialias text to allow redraw to diminish jagged edges and create a smooth appearance for all text and symbols in the plot window. Uncheck this box to disable the smoothing and make text and symbols crisper.
Enable OpenGL Hardware Acceleration
Check the box next to Enable OpenGL hardware acceleration to use the OpenGL driver included with your video card in the 2D plot view. If you experience any difficulties when creating 3D surface maps or see errors or crashes when displaying the 3D surface map, uncheck the box. Surfer must be restarted after making this change. This option does not affect the display or rendering in the 3D view.