LOS Doppler velocities (top) and line-core intensity (bottom) derived from the GRIS IFU mosaic at the Ca I, Si I, and He I lines (left to right) starting at 08:02 UT on 29 May. The major tick-marks represent 2″ on both the x- and y-axis covering a FOV of 18″ × 9″ for each map. The color bar on the top-right shows the velocity range of ±3 km s⁻¹ for the Ca I and Si I lines and of ±20 km s⁻¹ for the He I lines. The color bar on the bottom-right shows the line-core intensity in the range of (0.80–1.04), (0.36–0.56), and (0.60–1.04) for the Ca I, Si I, and He I lines, respectively. The black and white contours outline the pore. The contours shown here and in all subsequent figures are extracted from the GRIS continuum mosaic at 08:02 UT on 29 May. The artifacts seen in the maps are discussed in Sect. 2. An animation showing the evolution of the pore is available online.