This only affects the grid drawings. The grid drawing functions display the position of each displayed grid line or plane as text, e.g. as "x = 9". If the displayed grid covers a big area then the displayed texts at each line can become a problem for performance, since they are drawn very often (see MaxAllowedDrawnLinesPerFrame). In such cases you can use this flag to skip the name of the axis in the text display, so there will not be a "x = 9" at the axis, but only a "9". You can also influence the repetition frequency of the coordinate text displays via the "distanceBetweenRepeatingCoordsTexts" parameter of the grid drawing functions. See also skipLocalPrefix_inCoordinateTextsOnGridAxes.