A shorthand notation can be devised showing the locations of maximum electron density; thus, for the 300 reflection with a phase of 0°, maxima in electron density occur along the vertical solid lines, parallel to the unit cell c-axis:

Likewise, the maxima for a phase of 180° occur along the dashed lines:

For the two phase possibilities for the 300 reflection, the maxima in electron density lie along the solid lines or the dashed lines, depending on the phase: