This is the Curve tab of the Markers page of the Graph Options dialog box. The settings in this tab affect the appearance of Curve markers in your plot.
Marker Color: Click on this button to select what color you wish to use for curve markers. A Select Color dialog box is opened which allows you to select a color. This color is used for the curve marker symbol, and the label when it is displayed.
Show Parameters by default: Select this checkbox if you have parameters in your project and wish to display the parameter values for the selected curve in the Curve marker label. The default is not to include the parameters in the label.
And Hide Measurement label: This checkbox is only enabled when the Show Parameters by default checkbox is displayed. Selecting this checkbox removes the curve measurement from the label display so that only the parameter value(s) are displayed.